boat fuel consumption chart

Boat Fuel Consumption: 5 Tips for Measurement, Efficiency, and Savings

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Last Updated on November 3, 2023 by Boatsetter Team

Boat fuel consumption can be a rather significant expense , and it’s one that goes up as gas prices rise. While it’s true that you have to pay to play, there are some measures boaters can take to cut down on this expense as the price of gas goes up.

Here are five tips to help save money on marine fuel for your boat:

  • Lighten your load by removing excess gear and weight.
  • When operating, bring the boat on plane, then leave the throttle alone.
  • Understand how to properly trim your boat—if the bow seems high, trim it down.
  • Ensure your boat’s propeller is the right size, material, and model to maximize performance.
  • Keep the bottom of your boat’s hull clean and smooth.

Read on for further details and instructions on implementing each of these five tips, and be sure to use a boat fuel consumption chart to understand your engine’s ideal fuel economy.

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1. Lighten the Load

Many boats get loaded down over time without anyone even noticing, and the heavier your boat is, the less efficient it will be. While some gear is absolutely necessary, some other stuff may not be — and when added up it can weigh a ton.

  • Think about removing that extra anchor rode, the big box of fishing weights, dishware that never gets used, and similar items from the boat.
  • Also consider the water and waste tanks, if your boat has them. Can you get by with a half-full water tank? If so, you’ll shed eight pounds per gallon. W
  • When is the last time you pumped out the waste tank? Again, you can remove a lot of weight from the boat by lowering its level.

2. Bring the Boat on Plane, then Leave the Throttle Alone

As is true with cars, boats tend to burn less gas at slower speeds. Boats are different, however, in that most get the worst fuel economy just below planning speed and the best economy just above it.

There are certainly some exceptions (such as some trawlers and some boats propped to go very fast) but as a general rule, the average outboard powerboat will break onto plane right around 3000 to 3500 RPM. And in most cases, this is where they get the best cruising fuel economy.

Note that on newer board your MPG may be displayed on a gauge at the helm . In this case, simply eyeball that gauge and you can see just when the boat’s getting its peak mileage.

boat throttle in neutral

3. Tweak the Trim

Most boats run best on an even keel at a slight inclination of just two to four degrees. But depending on the boat’s design and the weight distribution of gear and passengers, you may need to adjust engine or drive trim and/or trim tabs to get it running this way.

If the bow seems to dig in try trimming the bow up a bit, and if you have to crane your neck to see over the bow, trim the bow down some.

4. Make Sure You Have the Right Propeller

Few boaters ever change propellers to see if they can gain a performance edge, but doing so can add several MPH to your cruising speed, which equates to more miles traveled for less gas burned .

Finding the ideal prop for your boat may take some experimentation; remember that your goal is to turn wide-open RPM in the middle of the manufacturer’s recommended range, and adding an inch of pitch will decrease rpm by about 200, while dropping by an inch will increase RPM by about the same amount.

Also note that switching from an aluminum propeller to a stainless-steel model can gain you one to three MPH, as well.

boat propeller contributes to fuel efficiency

5. Keep the Bottom of Your Boat Clean

Few things sap speed and increase fuel consumption like a dirty bottom. While antifouling paint will keep most of it at bay, its effectiveness can drop with age. Plus, even a freshly-painted boat can develop a layer of scum or slime, and many boats have unpainted underwater surfaces like transducers that growth can adhere to.

  • So, if your boat lives in a wet slip it’s a good idea to pull up to a sandbar or beach once in a while and gently scrub the bottom.
  • If there are any areas where more substantial growth has attached, scrape them clean with a rigid object that won’t damage the surfaces, like a plastic putty knife.

Employ all of these tips, and your boat may burn one, five, or even 10 gallons less fuel on your very next trip. Every boat will be different, of course, but no matter how large or small it may be, at today’s gas prices those saved gallons can add up to some serious cash in the bank.

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Lenny-Rudow

With over three decades of experience in marine journalism, Lenny Rudow has contributed to dozens of boating and fishing publications and websites ranging from BoatU.S. Magazine to BDOutdoors.com. Rudow is currently the Angler in Chief at Rudow’s FishTalk , he is a past president of Boating Writers International (BWI), a graduate of the Westlawn School of Yacht Design, and has won numerous BWI and OWAA writing awards.

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Fuel Calculator

Welcome to the West Nautical Fuel Calculator

HOW TO USE:

To plot points on the map, click with your mouse - this will automatically update the distance table. Then enter the speed, fuel consumption, and fuel cost to determine the total cost of the trip.

Example 1: A fast 30m yacht cruising at 20 knots ( Lady Amanda ) will consume roughly 400-500 l/hour (more depending on engine type).

Exampe 2: A typical displacement yacht may cruise at 12 knots and consume 300 l/hour

Example 3: Some yachts can cruise at 10 knots ( Firefly ) and consume 100 l/hour

Example 4: A sailing catamaran can cruise at 8 knots and consume around 35 l/hour

Fuel prices can fluctuate, but typically fuel is between €0.8-1.2 per litre.

Get in touch with one of our client managers for a more accurate fuel distance calculation.

  • 0 Fuel Consumed (L)
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About The Fuel Consumption Calculator

yacht outboard fuel consumption

Let’s face it. Boating is fun, but filling up at the marina (or even from your own fuel cans) can get expensive quick. Especially with the high cost of fuel these days.

It would be nice to know if there was a simple way to reduce your fuel consumption without cutting back on your boating enjoyment.  Fortunately, there is and that is exactly why I created the free boat fuel consumption calculator.

With it, you can calculate your engine fuel consumption and the cost of fuel for a single trip and for the entire season. You can even do “what if” comparisons to see how a change in operating speed could save you money at the pump.  Having an understanding of your boat’s basic fuel consumption curve will help you find that operating speed “sweet spot” where you’re still having fun and getting where you need to go, but with a little extra cash in your pocket.

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By clicking the Submit button below, you will get immediate access to the Fuel Consumption Calculator and agree to receive the monthly BoaterInput newsletters. We promise, no spam or junk mail, just valuable boating information and you can unsubscribe anytime.

Why Did I Build This Tool?

To be honest, I built this tool because no one else has built one.   And, because I think knowing your fuel consumption is helpful in several situations:

  • When your buddies are offering to “help” with gas and want to know how much to chip in.   Now you can easily let them know what the actual tab is (which is likely more than they were anticipating)
  • You are interested in reducing the cost of using your boat.   This tool will help you figure out how small changes in your operating speed can add up to substantial savings.
  • You are wondering how big of a boat to buy .  A 21′ bass boat with a 250 HP engine would be cool but my smaller boat with a 150 is much more economical.  In fact, the fuel consumption calculator estimates that I save over $800 a year by going with 100 fewer ponies.  That equates to several more rod/reel combos and far fewer trips lugging gas down to the dock.
  • You want to better understand the ongoing costs of boat ownership.   Are you someone who likes to follow a household budget?  Or are you contemplating buying your first boat and are wondering if you can afford the ongoing expense?  This tool will help you plan your budget to minimize surprises.

So, if any of these reasons interest you, click on button to request access to the fuel consumption calculator.  Best of all, it is completely free!

Jerry Mona

How Did I Design The Tool?

Cigarette 59' Tirranna

In order to estimate fuel consumption, I needed three inputs and a little algebra.

The first input was fuel consumption per horsepower .  As it turns out, gas engines consume approximately 0.5 lbs of fuel per horsepower per hour at wide open throttle (WOT).  Diesel engines consume slightly less (0.4 lbs).  This assumes a properly running, well-tuned engine.  Of course, unlike meat and produce, you don’t buy gas by the pound but by the gallon.  So, to convert fuel consumption into gallons, you simply divide by the fuel weight of 6.1 lbs per gallon for gasoline and 7.2 lbs for diesel.   But this still doesn’t get us where we need to be.  That is because, unless you are a boat racer, most do not run their engine at WOT 100% of the time.  Therefore, we need to account for reduced fuel consumption at lower RPM ranges.

This takes us to our second input – the relative rate of fuel consumption across the RPM band .  For this, I examined the fuel consumption curves for a variety of engine brands – including Mercury, Yamaha, Honda and Suzuki Outboards.  I even looked at data for MerCruiser and Volvo sterndrive (also known as I/O) engines.   For each engine type, I compared the fuel consumption curves for multiple engine sizes ranging from 25 HP to 425 HP for Outboards and 3.0L to 8.2 L for Sterndrives.

The third, and final, input needed is user-supplied data on how long, how often and at what speed you typically operate your engine(s) .  For this last item, I break things down into four categories for simplicity: Idle speed (between 500 and 1,000 RPMs) that is often used when docking or going through no-wake zones, Half Throttle (around 3,000 RPMs) which is often enough to hold a boat on plane, Three-Quarters throttle (~4,500 RPMs) and then WOT (~6,000 RPMs) .

In examining all of this data, I discovered two key things: 1) though the total fuel consumption varies by engine size, the relative rate of consumption is fairly constant.  In other words, whether you are looking at a 25 HP or 250 HP, the proportion of fuel consumed at various RPM ranges in comparison to WOT does not vary much.  And 2), the rate of fuel consumption is not linear across the RPM band.  For example, at half throttle (roughly 3,000 RPMs), you are only consuming about 30% of the fuel that you would at WOT (approximately 6,000 RPMs).  At three-quarters throttle, the rate is about 60%.  This is significant because it tells you that the last quarter of the throttle is far less efficient and key to saving you money on fuel.

Try my free tool and find out for yourself how small changes in your boat usage can really add up to big savings.

How to Use the Fuel Consumption Calculator

Using the tool is very simple.

The first thing you need to do is choose whether you want to estimate “Fuel Consumption only” based on your current usage OR “Also do What If Comparisons” to see how changes in your operating speed impacts your fuel economy.

Next, enter your engine parameters (size, number of engines, gas vs. diesel) and usage frequency (number of trips per year and average engine running time per trip) along with your average price for fuel.

Finally, specify the approximate percent of time you use your engine per outing at Idle speed, Half throttle, Three-Quarters Throttle and WOT.  If you chose to do “What Ifs”, you will need to specify the percent of time based on your current usage and an alternative usage scenario.

The calculator will then estimate the Gallons consumed per Outing , the Fuel Cost Per Outing , and the Total Fuel Cost Per Year .  If you ran a “What If” scenario, you will also see the potential savings .

Give the tool a try and let me know what you think.

Fuel Consumption

Be a Beta Tester…And Give Me Your Feedback!

Boat Fuel Consumption

This is a brand-new tool and unlike anything else available online.

It is still in beta-testing mode and so I would love it if you tried it and gave me your feedback.  Are the results consistent with your experience?  Is it easy to use? Is there anything else you would like to see?  If you are willing to share your experience, I’ll continue to “tweak” the tool to make it even better.

My goal is to help boaters save money and increase their boating enjoyment.  After all, if you are spending less on gas, that leaves more for tackle, gear and accessories, right?

Click on the button to access my free tool and let me know what you think.

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A Comprehensive Guide to Boat Fuel Consumption

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The 2024 boating season is approaching. And you might already have planned for your boating and fishing trips on the West Coast waters.

One of the key aspects of enjoying marine adventures with a seamless and cost-effective experience is understanding the calculation of fuel consumption. Optimized fuel efficiency can significantly impact an overall boating expenditure.

In this blog, we will look at the essentials of boat fuel consumption calculation. Whether you are looking to repower your boat or buy a new vessel and outboard, these considerations will enable you to select the right one based on comparison.

Understanding the Basics

Different factors contribute to the boat engine's overall output and fuel consumption. You need to understand the vessel's specifications, such as the model type, engine type & power, boat weight, and carrying capacity. Other aspects like the hull design, trim, and the water conditions you navigate in different weathers play crucial roles.

How to Calculate Vessel's Fuel Burn

Sea conditions are unpredictable compared to roadways. Hence, the time to cover a certain distance varies often. Fuel consumption is measured in gallons used per hour. Many modern engines come with fuel flow readouts. Still, knowing how to estimate fuel consumption while purchasing boats for sale in Canada will be an added advantage.

Let's assume that you are using gasoline as fuel.

It weighs 6.1 pounds per 1 gallon. An adequately maintained FourStroke engine burns approx. 0.50 pounds of gasoline every hour per horsepower unit.

Look at the formula below to calculate maximum fuel consumption.

Fuel Consumption (Gallons Per Hour) = (Fuel Used x Horsepower) / Fuel Specific Weight

So, if you have a 300 HP engine operating with gasoline, fuel consumption would be,

GPH = (0.5 x 300) / 6.1

It means your engine uses 24.5 gallons of gasoline per hour. Remember that your engine and vessel should be well-maintained for an ideal performance. Also, the distance of the journey, water conditions, cruising speed, and some other aspects play a role in calculating how much fuel will be consumed in your trip.

Top Factors Influencing Fuel Consumption

1. boat engine.

It is the most vital part of any vessel. Suppose you have powered your boat with sterndrive or outboard motors for sale . Their type, horsepower, and engine condition significantly impact fuel consumption. Companies like Mercury Marine build advanced outboard motors like ProKicker trolling outboards, SeaPro commercial outboards, Pro XS performance outboards, FourStroke recreational outboards, and Verado premium-series outboards with excellent power-to-weight ratios, impressive fuel systems, and optimized fuel injection (on most models) to maximize performance from every drop of the fuel. When upgrading your vessel with a new engine, opt for a balanced performance with fuel-efficient technology that can provide long-term savings.

https://aws.albernipowermarine.com/2024/02/Mercury-Boat-Engines-Canada-1708702488101.jpg

The type of boat engine, horsepower, and engine condition significantly impact fuel consumption.

2. Hull Shape

Different hull designs influence the boat movement on the plane differently. There are three main types of boat hulls: planing (flat bottom), semi-displacement, and full displacement. Suppose you bought a boat with a full displacement hull. In that case, you will experience higher fuel usage when you increase the boat speed. On the other hand, when you ride through high waves or rough water conditions on a semi-displacement or planing hull (flat bottom hull), fuel consumption is higher. However, fuel consumption decreases when the bow points down, even if the speed increases. A reliable fishing boat dealer in BC can help you understand more and select the proper boat hull based on the water conditions in your area.

https://aws.albernipowermarine.com/2024/02/Landing-Craft-Twin-115hp-Mercury-1708699072271.jpg

Planing (flat bottom) or semi-displacement hulls' fuel consumption could be more efficient if the weight distribution is optimized. But not on rough waters with higher waves.

3. Drag and Friction

These factors can decrease fuel efficiency by 15-20% or even more. Several reasons play a part in forming friction and drag. When the engine alignment is improper and the bearings are in non-ideal operating condition, you will experience friction. The hull fouling and a non-maintained boat propeller increase drag. A wide-open throttle test enables you to compare the RPM. For example, a sudden drop in RPM from the regular average indicates some issues, and you might need help from a marine mechanic.

https://aws.albernipowermarine.com/2024/02/FourStroke_75-115hp_ValveTrain-1708699192153.jpg

If bearings are in non-ideal operating condition, you will experience friction and lower fuel efficiency by 10-20%.

4. Weight Distribution

The vessel's weight, including the onboard members and cargo, affects the overall fuel consumption. An overloaded vessel or unevenly distributed weight impacts fuel efficiency. Some other factors influencing fuel usage are weather conditions, speed fluctuation, boat and engine condition, fuel quality, and your operating skills.

Tips to Increase/Maintain Fuel Efficiency

1.  Keep your vessel and the motor well-maintained and in good shape.

2. Select the right boat propeller considering diameter, pitch, and material while buying a new one or upgrading the existing one.

3. Adjust the trim. It can help reduce resistance and, subsequently, fuel consumption.

https://aws.albernipowermarine.com/2024/02/Outboard-Trim-and-Propeller-1708699876329.jpg

The adjusted trim and right propeller selection can help reduce fuel consumption.

4. Use modern marine electronics in Canada , which can provide real-time insights, empowering you to fine-tune cruising speed for ideal fuel usage.

5. Plan your boating or fishing journeys considering weather conditions to ensure safety and get maximum performance.

Understanding and calculating boat fuel consumption is vital. You need a holistic consideration of influencing factors and a strategic approach to achieve optimum fuel efficiency. If you are looking for a reliable dealer offering new and used boats for sale , connect with Alberni Power & Marine. Our vast inventory of vessels, engines, marine electronics, and other marine essentials is available for your selection. Visit us today!

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Boat Fuel Consumption Calculator

Author: Calculator Academy Team

Last Updated: July 25, 2023

Enter any 3 values to calculate the missing variable

Enter the specific fuel consumption, horsepower, and fuel-specific weight into the calculator to determine the boat fuel consumption.

  • BSFC (Brake Specific Fuel Consumption) Calculator
  • Brake Horsepower Calculator
  • Boat Speed Calculator
  • Hull Speed Calculator
  • Sailboat Value Calculator

Boat Fuel Consumption Formula

The following formula is used to calculate a boat’s fuel consumption.

  • Where FC is the fuel consumption at max throttle (gallons/hour)
  • Gas = .50 lbs per HP
  • Diesel = .40 lbs per HP
  • HP is the engine horsepower
  • Gas = 6.1 lbs per gal
  • Diesel = 7.2 lbs per gal

To calculate boat fuel consumption, multiply the fuel consumption at max throttle by the engine horsepower, then divide by the fuel specific weight.

What is a boat fuel consumption?

A boat fuel consumption is a rate at which the engine on a boat consumes fuel, typically measured in gallons per hour.

The fuel consumption depends on the horsepower of the engine, throttle level, and type of fuel used.

How to calculate boat fuel consumption?

Example Problem:

The following example outlines how to calculate the fuel consumed by a boat engine.

First, determine the horsepower of the engine. In this example, the boat has one engine with a horsepower of 400 HP.

Next, determine the specific fuel consumption and fuel-specific weight of the fuel. In this example, the fuel is gas so these values are .50 and 6.1 respectively.

Finally, calculate the fuel consumption at max throttle using the formal above:

FC = (SFC * HP) / FSW

FC = (.50 * 400) / 6.1

FC = 32.786 gallons per hour

To determine how much fuel would be used at half throttle/half horsepower, divide the result by 2.

32.786 / 2 = 16.393 gallons per hour

Boat Fuel Consumption Calculator

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How Much Fuel Does a Boat Use Per Hour? A Comprehensive Guide

Boating enthusiasts and boat owners alike often wonder how much fuel their boat uses per hour.

The answer to the question of how much fuel does a boat use is not straightforward, as fuel consumption can vary depending on several factors. Boat size, weight, engine type, and speed are just a few examples of the variables that can affect fuel usage.

Understanding how much fuel a boat uses per hour is crucial for boaters who want to plan their trips and budget accordingly. Furthermore, knowing how to calculate fuel consumption can help boaters make informed decisions when shopping for a new boat or engine.

How Much Fuel Does a Boat Use Per Hour

In this article, we will explore the factors that influence fuel consumption in boats and provide tips on how to estimate fuel usage. By the end of this article, readers will have a better understanding of how much fuel their boat uses per hour and how to optimize their fuel consumption.

Understanding Fuel Consumption in Boats

Boat fuel consumption can vary significantly depending on various factors. Understanding these factors is crucial to estimate how much fuel a boat will consume in a given period. This section will discuss some of the critical factors that affect fuel consumption and how to calculate it.

Factors Affecting Fuel Consumption

  • Boat Type and Size: The type and size of the boat have a significant impact on fuel consumption. Smaller boats tend to consume less fuel than larger boats. For example, a 20-foot boat will consume less fuel than a 40-foot boat with the same engine.
  • Engine Type and Size: The type and size of the engine also play a crucial role in fuel consumption. A larger engine will consume more fuel than a smaller engine, even if both are of the same type. Gasoline engines tend to consume more fuel than diesel engines.
  • Weight: The weight of the boat and its load can affect fuel consumption. A heavier boat will require more fuel to move than a lighter boat.
  • Speed: The speed at which the boat is traveling can significantly impact fuel consumption. Boats that travel at higher speeds tend to consume more fuel than boats that travel at lower speeds.
  • Weather and Water Conditions: Weather and water conditions can affect fuel consumption. Boats traveling against the tide or in rough water will consume more fuel than boats traveling with the tide or in calm water.

cabin cruiser running at high speed and increases boat fuel consumption

Calculating How Much Fuel Does a Boat Use Per Hour

To calculate fuel consumption, you need to know the fuel burn rate of the engine. The fuel burn rate is the amount of fuel the engine consumes per hour. You can calculate the fuel burn rate by dividing the engine’s horsepower by the fuel consumption rate.

For example, if an engine has a horsepower of 100 and consumes 10 gallons of fuel per hour, the fuel burn rate would be 10/100, which is 0.1 gallons per horsepower per hour.

Once you know the fuel burn rate, you can estimate how much fuel the boat will consume in a given period. For example, if the boat travels at a speed of 20 knots and has a fuel burn rate of 0.1 gallons per horsepower per hour, and the engine has 200 horsepower, the boat will consume 20 gallons of fuel per hour.

In conclusion, understanding fuel consumption in boats requires knowledge of several critical factors, including boat type and size, engine type and size, weight, speed, and weather and water conditions. Calculating fuel consumption involves determining the fuel burn rate of the engine and estimating how much fuel the boat will consume in a given period.

Types of Boats and Their Fuel Consumption

When it comes to fuel consumption, different types of boats have different requirements. Factors such as the boat’s size, weight, and speed all play a role in determining how much fuel it will consume per hour. Here are some common types of boats and their typical fuel consumption rates.

Fishing Boats

Fishing boats are typically smaller and slower than other types of boats, which means they use less fuel. On average, a fishing boat will use between 3 and 8 gallons of fuel per hour at cruising speed.

Pontoon Boats

Pontoon boats are popular for leisurely cruising and entertaining. They are larger than fishing boats and have a flat bottom, which makes them more stable. However, this also means they use more fuel. A pontoon boat will typically use between 5 and 15 gallons of fuel per hour at cruising speed.

Bass boats are designed for fishing and are typically smaller and faster than other types of boats. They are also more fuel-efficient, using between 3 and 6 gallons of fuel per hour at cruising speed.

Center Console Boats

Center console boats are versatile and can be used for fishing, cruising, and water sports. They are larger than bass boats and typically use between 10 and 20 gallons of fuel per hour at cruising speed.

Cabin Cruiser Boats

Cabin cruiser boats are designed for overnight trips and have a cabin with sleeping quarters and a bathroom. They are larger and heavier than other types of boats, which means they use more fuel. A cabin cruiser boat will typically use between 20 and 30 gallons of fuel per hour at cruising speed.

Bowrider Boats

Bowrider boats are popular for water sports and leisurely cruising. They are typically smaller than cabin cruiser boats but larger than fishing boats. A bowrider boat will typically use between 5 and 15 gallons of fuel per hour at cruising speed.

Overall, the fuel consumption of a boat depends on various factors such as boat size, weight, and speed. Understanding the fuel consumption of different types of boats can help you make an informed decision when choosing a boat that meets your needs while minimizing your fuel costs.

Engine Size and Power

Understanding horsepower.

When it comes to boat engines, horsepower is a crucial factor in determining how much fuel a boat will consume per hour. Horsepower is a measure of the engine’s power output, and it directly affects the speed and performance of the boat. The more horsepower an engine has, the faster the boat will go, but it will also consume more fuel.

How Engine Size Affects Fuel Consumption

Another important factor that affects fuel consumption is the engine size. The size of the engine is measured in horsepower, and it can range from small outboard motors with 9.9 hp to large inboard engines with over 300 hp. In general, larger engines consume more fuel than smaller engines, but they also provide more power and speed.

The type of engine is also important when it comes to fuel consumption. Two-stroke engines are known to be less fuel efficient than four-stroke engines, but they are also lighter and provide more power. Four-stroke engines, on the other hand, are more fuel efficient and produce less emissions , but they are heavier and provide less power.

The weight of the boat and the drag created by the hull also play a role in fuel consumption. Heavier boats require more power to move through the water, which means they will consume more fuel. Boats with a sleek, streamlined hull design will create less drag and require less power to move through the water, resulting in lower fuel consumption.

Here is a table that shows the average fuel consumption for different engine sizes:

Engine SizeFuel Consumption (Gallons per Hour)
9.9 hp0.5 – 1.5
15 hp0.75 – 2
20 hp1 – 3
25 hp1.5 – 3.5
40 hp2.5 – 6
50 hp3 – 7
60 hp3.5 – 8
75 hp4 – 10
90 hp5 – 12
115 hp6 – 15
175 hp10 – 25
200 hp12 – 30
225 hp14 – 35
250 hp16 – 40
20 – 50

It’s important to note that these numbers are just averages, and actual fuel consumption will depend on a variety of factors, including boat weight , hull design, and weather conditions.

Cruising Speed and Fuel Efficiency

Understanding cruising speed.

Cruising speed is the speed at which a boat travels comfortably and efficiently. It is important to understand that cruising speeds vary depending on the type of boat, weather conditions, water conditions, and the number of passengers on board. In general, most boats have a cruising speed of around 20-30 knots.

When a boat is traveling at its cruising speed, it is operating at its most efficient fuel consumption rate. Going faster than the cruising speed can result in a significant increase in fuel consumption. On the other hand, going slower than the cruising speed can also result in increased fuel consumption as the boat struggles to maintain speed.

How to Optimize Fuel Efficiency

To optimize fuel efficiency, it is important to find the ideal cruising speed for your boat. This can be done by conducting a fuel consumption test. Take a piece of paper and make a table, or use a spreadsheet, listing out the rpm, speed in mph, and amount of fuel burned per hour, or gph. Divide the speed by the gph, and you’ll get mpg.

To further optimize fuel efficiency, consider the following tips:

  • Reduce weight on board: The more weight on board, the more fuel the boat will consume. Remove any unnecessary items to reduce weight.
  • Maintain the boat: A well-maintained boat will operate more efficiently and consume less fuel.
  • Adjust trim: Adjusting the trim of the boat can help reduce drag and increase fuel efficiency.
  • Monitor weather and water conditions: Rough weather and choppy waters can cause the boat to consume more fuel. Avoid these conditions when possible.

In conclusion, understanding cruising speed and optimizing fuel efficiency can help reduce fuel consumption and save money. Conducting a fuel consumption test and following these tips can help you find the ideal cruising speed for your boat and reduce fuel consumption.

Fuel Costs and Maintenance

Boat ownership comes with a set of responsibilities that extend beyond simply enjoying the water. One of the most significant factors to consider is the cost of fuel and maintenance.

Calculating Fuel Costs

Fuel costs are a significant expense for boat owners, and calculating them can be challenging. The amount of fuel a boat uses per hour depends on several factors, including the size and weight of the vessel, the type of engine, and the speed at which it is traveling.

Boat owners can use a fuel consumption calculator to estimate how much fuel their vessel will consume based on these factors. It is important to remember that fuel prices can vary depending on the marina and the type of fuel used.

Fuel-Efficient Boats

Fuel-efficient boats are becoming increasingly popular among boat owners due to the cost savings they offer. These boats are designed with fuel efficiency in mind and typically have smaller engines that consume less fuel.

Boat owners can also take steps to make their vessels more fuel-efficient, such as reducing their speed, maintaining their engines, and properly inflating their tires.

Maintenance Tips

Proper maintenance is crucial for keeping a boat in good working condition and minimizing fuel costs. Boat owners should regularly inspect their vessels for any signs of wear and tear and address any issues promptly.

Regular engine maintenance, such as oil changes and filter replacements, can also help improve fuel efficiency and reduce the risk of breakdowns. Boat owners should also ensure that their boats are properly cleaned and stored to prevent damage from the elements.

In conclusion, fuel costs and maintenance are significant expenses for boat owners to consider. By calculating fuel costs, investing in fuel-efficient boats, and practicing proper maintenance, boat owners can minimize their expenses and enjoy their vessels for years to come.

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Frequently Asked Questions

What is the average fuel consumption for a boat per hour.

The average fuel consumption for a boat per hour varies depending on several factors such as the size and type of the boat, the engine’s horsepower, and the speed at which the boat is traveling. As a general rule of thumb, a small boat with a 25-horsepower engine can consume around 2-3 gallons of fuel per hour, while a larger boat with a 200-horsepower engine can consume around 20-30 gallons of fuel per hour.

How do I calculate fuel usage for a boat trip?

To calculate fuel usage for a boat trip, you need to know the boat’s fuel consumption rate, the distance to be covered, and the speed at which you will be traveling. You can use an online fuel consumption calculator or a fuel flow meter to determine the boat’s fuel consumption rate. Once you have this information, you can estimate how much fuel you will need for your trip.

What is the fuel efficiency of a 26-foot boat?

The fuel efficiency of a 26-foot boat depends on several factors such as the boat’s weight, the engine’s horsepower, and the speed at which the boat is traveling. On average, a 26-foot boat with a 250-horsepower engine can consume around 20-25 gallons of fuel per hour at cruising speed.

How much fuel does a 50-foot boat use per hour?

The amount of fuel a 50-foot boat uses per hour depends on several factors such as the boat’s weight, the engine’s horsepower, and the speed at which the boat is traveling. On average, a 50-foot boat with a 500-horsepower engine can consume around 50-60 gallons of fuel per hour at cruising speed.

How much diesel fuel is consumed per horsepower?

On average, a diesel engine consumes around 0.4 pounds of fuel per hour for each unit of horsepower it produces. For example, a 200-horsepower diesel engine would consume around 80 pounds of fuel per hour.

How far can a boat travel on a full tank of gas?

The distance a boat can travel on a full tank of gas depends on several factors such as the boat’s fuel consumption rate, the size of the fuel tank, and the speed at which the boat is traveling. On average, a boat can travel around 100-200 miles on a full tank of gas. However, this can vary significantly depending on the boat’s size, weight, and engine horsepower.

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I worked as an officer in the deck department on various types of vessels, including oil and chemical tankers, LPG carriers, and even reefer and TSHD in the early years. Currently employed as Marine Surveyor carrying cargo, draft, bunker, and warranty survey.

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yacht outboard fuel consumption

Calculating Boat Fuel Consumption

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Key Take­aways:

  • Weight, speed, hull con­di­tion, and engine type all affect boat fuel con­sump­tion.
  • Gath­er­ing data on dis­tance trav­eled, fuel con­sump­tion rate, and fuel tank capac­i­ty is impor­tant for cal­cu­lat­ing fuel con­sump­tion.
  • It can be mea­sured using met­rics such as miles per gal­lon (MPG), horse­pow­er per gal­lon (HPG), and emis­sion rat­ings .
  • Fac­tors such as hull design, engine type, and boat weight/load impact fuel con­sump­tion , so choos­ing the right boat type can max­i­mize fuel effi­cien­cy.

Then under­stand­ing how to cal­cu­late boat fuel con­sump­tion is essen­tial. By gath­er­ing the nec­es­sary data and under­stand­ing fuel effi­cien­cy rat­ings, you can esti­mate fuel con­sump­tion for dif­fer­ent boat types and spe­cif­ic activ­i­ties.

This arti­cle will pro­vide you with tips for reduc­ing fuel con­sump­tion , empow­er­ing you to enjoy your boat­ing adven­tures with­out wor­ry­ing about run­ning out of fuel.

Get ready to embark on your next jour­ney with con­fi­dence!

Table of Con­tents

Factors Affecting Boat Fuel Consumption

There are sev­er­al fac­tors that can affect your boat’s fuel con­sump­tion. Under­stand­ing these fac­tors is cru­cial for those who desire free­dom on the open waters.

One fac­tor to con­sid­er is the weight of your boat. The heav­ier your boat is, the more fuel it will require to move through the water. So, if you want to max­i­mize your free­dom and reduce fuel con­sump­tion, it’s impor­tant to pack light and only bring the essen­tials.

Anoth­er fac­tor to keep in mind is the speed at which you choose to nav­i­gate. Going full throt­tle may give you a thrill, but it will also burn through fuel quick­ly. To con­serve fuel and pro­long your free­dom on the water, try reduc­ing your speed and enjoy­ing a more leisure­ly pace.

Con­di­tion of your boat’s hull can impact fuel con­sump­tion. A clean hull cre­ates less drag, allow­ing your boat to glide through the water more effi­cient­ly. Make sure to reg­u­lar­ly clean and main­tain your boat’s hull to min­i­mize fuel con­sump­tion and max­i­mize your free­dom.

Type of engine you have plays a sig­nif­i­cant role in fuel con­sump­tion. Opt­ing for a more fuel-effi­cient engine can help you save mon­ey and extend your time on the water. Con­sid­er research­ing and invest­ing in an engine that aligns with your desire for free­dom and cost-effec­tive­ness.

How to Calculate Boat Fuel Consumption

Gathering the Necessary Data

To gath­er the nec­es­sary data for cal­cu­lat­ing boat fuel con­sump­tion, there are a few key data ele­ments you need to con­sid­er.

These include:

  • The dis­tance trav­eled
  • The time tak­en
  • The fuel con­sumed

You can col­lect this data through meth­ods such as:

  • Using a GPS to track your route
  • Tim­ing your jour­ney
  • Mon­i­tor­ing your fuel usage.

Key Data Elements

You should gath­er some key data ele­ments to cal­cu­late your boat’s fuel con­sump­tion. Here are three impor­tant pieces of infor­ma­tion you need to col­lect:

  • Dis­tance Trav­eled: Mea­sure the dis­tance in nau­ti­cal miles that you plan to trav­el on your boat. This can be done using GPS or nau­ti­cal charts.
  • Fuel Con­sump­tion Rate: Deter­mine how much fuel your boat con­sumes per hour of oper­a­tion. You can find this infor­ma­tion in your boat’s man­u­al or by con­sult­ing the man­u­fac­tur­er.
  • Fuel Tank Capac­i­ty: Know the total capac­i­ty of your boat’s fuel tank. This will help you cal­cu­late the num­ber of refills need­ed for your trip.

Data Collection Methods

To accu­rate­ly cal­cu­late your boat’s fuel con­sump­tion, you can gath­er the nec­es­sary data through var­i­ous meth­ods. Here are some options for col­lect­ing the data you need:

Man­u­al mea­sure­mentKeep track of fuel lev­els before and after each trip.Sim­ple and cost-effec­tive.
Fuel flow meterInstall a device that mea­sures the amount of fuel con­sumed.Pro­vides accu­rate and real-time data.
GPS track­ingUse a GPS sys­tem that cal­cu­lates fuel con­sump­tion based on dis­tance trav­eled.Con­ve­nient and reli­able for long jour­neys.

These meth­ods allow you to gath­er the required infor­ma­tion to cal­cu­late your boat’s fuel con­sump­tion accu­rate­ly. Choose the method that suits your needs and pref­er­ences. Remem­ber, hav­ing the nec­es­sary data will give you the free­dom to plan your boat­ing trips more effi­cient­ly while man­ag­ing your fuel con­sump­tion effec­tive­ly.

Understanding Fuel Efficiency Ratings

The fuel effi­cien­cy rat­ings can help you deter­mine how effi­cient­ly your boat uses fuel. Under­stand­ing these rat­ings is cru­cial for opti­miz­ing your boat’s fuel con­sump­tion and sav­ing mon­ey in the long run. Here are three key points to con­sid­er:

  • Miles per gal­lon (MPG): This rat­ing mea­sures the dis­tance your boat can trav­el on one gal­lon of fuel. The high­er the MPG, the more fuel-effi­cient your boat is. Aim for a high­er MPG rat­ing to max­i­mize your fuel effi­cien­cy and min­i­mize the num­ber of refu­el­ing stops dur­ing your adven­tures.
  • Horse­pow­er per gal­lon (HPG): This rat­ing indi­cates the pow­er out­put of your boat’s engine per gal­lon of fuel con­sumed. A high­er HPG means your boat’s engine is more effi­cient and can gen­er­ate more pow­er using less fuel. Keep an eye on this rat­ing to ensure you’re get­ting the most out of each gal­lon of fuel.
  • Emis­sion rat­ings: In addi­tion to fuel effi­cien­cy, it’s impor­tant to con­sid­er the envi­ron­men­tal impact of your boat’s fuel con­sump­tion. Emis­sion rat­ings indi­cate the amount of pol­lu­tants released into the air while your boat is in oper­a­tion. Opt for boats with low­er emis­sion rat­ings to min­i­mize your car­bon foot­print and con­tribute to a clean­er envi­ron­ment.

Under­stand­ing and mon­i­tor­ing these fuel effi­cien­cy rat­ings will empow­er you to make informed deci­sions about your boat’s fuel con­sump­tion, allow­ing you to enjoy your boat­ing adven­tures with the free­dom of know­ing you’re using fuel effi­cient­ly and respon­si­bly.

Calculating Boat Fuel Consumption

Calculating Fuel Consumption for Different Boat Types

When it comes to cal­cu­lat­ing fuel con­sump­tion for dif­fer­ent boat types, there are a few fac­tors to con­sid­er.

The effi­cien­cy of each boat type can vary great­ly, with some boats being more fuel-effi­cient than oth­ers.

Addi­tion­al­ly, fac­tors such as boat size, weight, engine pow­er, and speed can also affect fuel con­sump­tion.

Efficiency of Boat Types

For opti­mal fuel effi­cien­cy, con­sid­er the type of boat you’re using and the con­di­tions you’ll be nav­i­gat­ing in. Dif­fer­ent boat types have vary­ing lev­els of effi­cien­cy, so it’s impor­tant to choose the right one for your needs.

Here are three things to con­sid­er when cal­cu­lat­ing fuel con­sump­tion for dif­fer­ent boat types:

  • Hull Design : Boats with a plan­ing hull, like power­boats and speed­boats, are designed to ride on top of the water, reduc­ing drag and increas­ing fuel effi­cien­cy. On the oth­er hand, boats with a dis­place­ment hull, like sail­boats and trawlers, are designed to dis­place water as they move, mak­ing them more fuel-effi­cient at low­er speeds.
  • Engine Type : The type of engine your boat has can also affect fuel con­sump­tion. Out­board motors are gen­er­al­ly more fuel-effi­cient com­pared to inboard engines, as they’re lighter and have bet­ter pow­er-to-weight ratios.
  • Weight and Load : The weight and load of your boat can impact fuel con­sump­tion. A lighter boat will require less pow­er to move through the water, result­ing in bet­ter fuel effi­cien­cy. Sim­i­lar­ly, car­ry­ing excess weight or over­load­ing your boat can increase fuel con­sump­tion, so it’s impor­tant to only car­ry what’s nec­es­sary.

Con­sid­er­ing these fac­tors will help you choose a boat type that suits your needs while also max­i­miz­ing fuel effi­cien­cy.

Enjoy the free­dom of the open water while min­i­miz­ing your fuel costs!

Factors Affecting Consumption

Con­sid­er three main fac­tors that can affect fuel con­sump­tion when cal­cu­lat­ing fuel con­sump­tion for dif­fer­ent boat types.

The first fac­tor is the boat’s weight. Heav­ier boats require more ener­gy to move through the water, result­ing in high­er fuel con­sump­tion.

The sec­ond fac­tor is the boat’s speed. Faster speeds typ­i­cal­ly require more pow­er, lead­ing to increased fuel usage.

Last­ly, the boat’s hull design plays a cru­cial role. Boats with sleek and stream­lined hulls have less resis­tance in the water, allow­ing them to glide more effi­cient­ly and use less fuel. On the oth­er hand, boats with bulky and inef­fi­cient hull designs expe­ri­ence greater resis­tance, result­ing in high­er fuel con­sump­tion.

Estimating Fuel Consumption for Specific Activities

If you want to accu­rate­ly esti­mate fuel con­sump­tion for spe­cif­ic activ­i­ties, it’s impor­tant to take into account fac­tors such as speed, dis­tance, and engine effi­cien­cy. By con­sid­er­ing these fac­tors, you can bet­ter plan your boat­ing adven­tures and ensure you have enough fuel for the jour­ney.

Here are three things to keep in mind when esti­mat­ing fuel con­sump­tion for spe­cif­ic activ­i­ties:

  • Activ­i­ty Type : Dif­fer­ent boat­ing activ­i­ties require dif­fer­ent amounts of fuel. For exam­ple, if you’re plan­ning on cruis­ing at a steady speed, your fuel con­sump­tion will be low­er com­pared to activ­i­ties that involve fre­quent accel­er­a­tions or high speeds.
  • Route Plan­ning : The dis­tance you plan to trav­el plays a sig­nif­i­cant role in fuel con­sump­tion. It’s essen­tial to map out your route and account for any detours or diver­sions. By esti­mat­ing the total dis­tance, you can cal­cu­late how much fuel you’ll need for the entire trip.
  • Engine Effi­cien­cy : The effi­cien­cy of your boat’s engine can great­ly impact fuel con­sump­tion. Reg­u­lar engine main­te­nance, such as tun­ing and clean­ing, can improve its effi­cien­cy and help you save on fuel costs.

Tips for Reducing Boat Fuel Consumption

To max­i­mize fuel effi­cien­cy, there are sev­er­al steps you can take. Pri­or­i­tize main­tain­ing the opti­mal speed for your boat. By keep­ing your boat at the right speed, you can reduce fuel con­sump­tion and enjoy longer jour­neys on the water. Avoid unnec­es­sary accel­er­a­tion and main­tain a steady pace to con­serve fuel.

Anoth­er tip is to plan your trips in advance and choose the most direct routes. Avoid unnec­es­sary detours or zigzag­ging, as they can increase fuel con­sump­tion.

Prop­er­ly main­tain your boat. Reg­u­lar­ly check and clean the hull to reduce drag and improve fuel effi­cien­cy. Keep an eye on the engine and ensure it’s run­ning smooth­ly, as a well-main­tained engine con­sumes less fuel.

Con­sid­er installing a fuel flow meter to mon­i­tor your boat’s fuel con­sump­tion in real-time. This can help you adjust your speed and opti­mize your fuel effi­cien­cy.

Reduce the weight on your boat by remov­ing any unnec­es­sary items. Light­en­ing the load can improve your boat’s per­for­mance and decrease fuel con­sump­tion.

It is also impor­tant to keep in mind that fuel con­sump­tion can vary depend­ing on a num­ber of fac­tors, such as the weight of the boat, the type of water it is being used in, and the speed of the boat. There­fore, it is impor­tant to take all of these fac­tors into con­sid­er­a­tion when cal­cu­lat­ing your boat’s fuel con­sump­tion.

There are sev­er­al fac­tors that affect the amount of fuel a boat con­sumes. The size of the boat, the type of engine, the load being car­ried, the speed of the boat, the type of fuel, and the weath­er con­di­tions all play a role in the amount of fuel con­sump­tion. If You think its not suf­fi­cient see how to build boat fuel tank to make it larg­er.

Size of the Boat

The size of the boat is an impor­tant fac­tor in fuel con­sump­tion. Larg­er boats typ­i­cal­ly con­sume more fuel than small­er boats due to their greater weight and increased drag.

Type of Engine

The type of engine is anoth­er fac­tor that affects fuel con­sump­tion. Inboard engines typ­i­cal­ly con­sume more fuel than out­board engines due to their greater weight and size. Addi­tion­al­ly, diesel engines tend to con­sume more fuel than gaso­line engines.

Load Being Carried

The amount of weight being car­ried by the boat will also affect fuel con­sump­tion. If a boat is car­ry­ing a heavy load, it will require more fuel to move the extra weight through the water.

Speed of the Boat

The speed of the boat will also affect fuel con­sump­tion. The faster the boat is trav­el­ling, the more fuel it will con­sume.

Type of Fuel

The type of fuel being used will also affect fuel con­sump­tion. Dif­fer­ent fuels have dif­fer­ent lev­els of effi­cien­cy, so it is impor­tant to use the most effi­cient fuel pos­si­ble in order to max­i­mize fuel econ­o­my.

Weather Conditions

The weath­er con­di­tions can also have an effect on fuel con­sump­tion. If the boat is trav­el­ling against the wind, it will require more fuel to main­tain speed. If the water is rough, it will require more fuel to com­bat the waves.

Additional Tips for Saving Fuel

How much fuel does a boat use per hour?

The amount of fuel a boat uses per hour depends on a vari­ety of fac­tors, such as the size and type of the boat, the pow­er of the engine, the load it is car­ry­ing, and the speed it is trav­el­ling. Gen­er­al­ly, a small out­board motor­boat uses about 1 to 2 gal­lons of fuel per hour, while a larg­er motor­boat with an inboard engine can use up to 20 or more gal­lons of fuel per hour.

Type of fuel used can also affect the amount of fuel con­sumed. Boats that use gaso­line typ­i­cal­ly use more fuel than those that use diesel, as diesel engines are more fuel-effi­cient. The cost of fuel also needs to be tak­en into con­sid­er­a­tion, as high­er-grade fuels are more expen­sive but can improve fuel econ­o­my. Effi­cien­cy of the boat’s engine and the con­di­tion of the pro­peller can also have an effect on fuel usage.

It’s impor­tant to note that these fig­ures are approx­i­mate and can vary sig­nif­i­cant­ly based on the fac­tors men­tioned ear­li­er. To get a more accu­rate esti­mate of your boat’s fuel con­sump­tion, it’s best to con­sult your boat’s own­er’s man­u­al or engine spec­i­fi­ca­tions, which typ­i­cal­ly pro­vide spe­cif­ic fuel con­sump­tion rates at dif­fer­ent speeds or RPM set­tings. Addi­tion­al­ly, mon­i­tor­ing fuel con­sump­tion dur­ing your trips and keep­ing a record can help you deter­mine your boat’s aver­age fuel usage.

How can I calculate the fuel consumption of my boat?

To cal­cu­late your boat’s fuel con­sump­tion, you can start by not­ing the engine’s rat­ed fuel con­sump­tion in gal­lons per hour (gph) or liters per hour (lph) at var­i­ous RPM set­tings. Mul­ti­ply the engine’s rat­ed fuel con­sump­tion by the num­ber of hours you plan to run the boat. Keep in mind that fac­tors such as speed, load, and weath­er con­di­tions can affect the actu­al fuel con­sump­tion.

Is there a formula to estimate boat fuel consumption?

Is there a for­mu­la to esti­mate boat fuel con­sump­tion? While there isn’t a uni­ver­sal for­mu­la for esti­mat­ing boat fuel con­sump­tion, you can use a rough esti­mate by con­sid­er­ing your boat’s engine spec­i­fi­ca­tions, includ­ing the rat­ed fuel con­sump­tion at dif­fer­ent RPMs, the boat’s cruis­ing speed, and the dura­tion of your trip.

How can I improve fuel efficiency and reduce boat fuel consumption?

To improve fuel effi­cien­cy and reduce fuel con­sump­tion, you can fol­low these tips: main­tain your boat’s engine and pro­peller in good con­di­tion, keep the boat’s hull clean to reduce drag, avoid exces­sive speed and rapid accel­er­a­tion, trim the boat prop­er­ly to min­i­mize resis­tance, plan effi­cient routes, and reduce unnec­es­sary weight onboard.

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Boat Fuel Consumption List

The fuel consumption of any yacht, can vary widely based on several factors including the yacht's size, engine type, cruising speed, and conditions under which it is operated.

The figures above are average calculated.

Boat Name Average Fuel Consumption (liters per hour)
Waterdream 200-300L
Mangusta 108 990L
CRN 130 650L
Astondoa 102 GLX 650L
Pershing 5X 250L
Pardo 50 200L
Princess V72 400L
Mangusta 92 700L
Sunseeker Predator 84 600L
Leopard 27 550L
VanDutch 55 200L
Pershing 72 600L
Vanquish 82 350L
Pershing 90 900L
Vanquish 52 200L
Riva Rivale 56 250L

Boat Fuel Cost Calculator

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Measuring your Yacht Fuel Consumption per Hour

Oct 10, 2019

less than a min

Measuring your Yacht Fuel Consumption per Hour

How to measure your yacht fuel consumption per hour

Yachts are quite similar to other vehicles in the sense that they work through fuel. Similarly to any other vehicle, it is important to calculate the yacht fuel consumption per hour before you plan a trip or before you purchase a vessel. Fuel consumption is also a good comparison base between boats. Whether before going on a trip, or buying a yacht, you need to have all the facts straight and know how much money you are going to invest not only at once upon purchase but also periodically.

There are different factors in the fuel consumption of a yacht. For example, if you use a generator or if you stay at anchor instead of docking, the fuel consumption will be increased . The itinerary will change fuel consumption as well. Sea is different than roads and the conditions in a sea change more dramatically than on land, which also impacts fuel consumption.

Fuel consumption for boats is measured in gallons per hour . The efficiency of boat fuel is measured in pounds of fuel that are used in an hour per horsepower. In order to be able to read the calculation right, any boat owner should know that gasoline is almost 6.1 pounds per gallon while diesel is 7.2 pounds per gallon .

Usually, if you consider that all sea conditions are pristine, the fuel consumption of a normal diesel engine is 0.4 pounds per hour for each unit of horsepower.

How to calculate yacht fuel consumption

Calculating it by hand is complicated, which is why many people choose to use online calculators . The way it works is it allows you to put down certain parameters that calculate the fuel consumption. These parameters include route , units of measurement and engine power .

Lastly , what most people are interested in is actually the cost of fuel consumption per hour. So the last parameter to include is the current price of fuel . Marine websites usually include this price up to date.

Another step that people have taken is develop a boat fuel consumption chart for their own boat and find the average in a month.

Alternatively, there is a formula that calculates the maximum fuel consumption of the engine which is:

GPH = (specific fuel consumption x HP) / The specific weight of fuel

This formula determines the fuel consumption when the engine is at full speed . If the speed is decreased then the fuel consumption is decreased as well. Basically, what you need to do is include the horsepower rate of the boat and you multiply it by the specific fuel consumption average and you divide that product by the weight of the fuel.

If you want to compare your boats GPH with other boats than you can use TheBoatDB database. If you already have a boat you can register for free and compare it with other boats within the database.

These are simple methods to calculate fuel consumption, however for a precise one you would have to know all the specifics of your boat and put the parameters through the calculator.

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Boat Fuel Efficiency | How to Get the Most Out of Your Outboard Motor

Boat Fuel Efficiency | How to Get the Most Out of Your Outboard Motor

Boat Fuel Efficiency: How to Get the Most Out of Your Outboard Motor

Fuel efficiency is a crucial aspect of boating that impacts both the environment and your wallet. In the world of outboard motors, understanding and optimizing fuel usage is key to a cost-effective and eco-friendly boating experience.

This guide dives into the importance of fuel efficiency for boat owners, explores the critical fuel components of outboard motors, and provides actionable tips to enhance your boat's fuel efficiency.

The Importance of Fuel Efficiency in Boating

yacht outboard fuel consumption

Fuel efficiency goes beyond just saving at the pump; it's a cornerstone of modern, responsible boating. Efficient fuel usage reduces greenhouse gas emissions, minimizing your environmental footprint.

It's not only an eco-friendly practice but also a financially savvy one. Maximizing fuel efficiency extends the life of your outboard motor, reduces the frequency of repairs, and ensures optimal performance. This is especially crucial in times of rising fuel costs, where efficient fuel use can lead to significant savings over time.

Moreover, efficient fuel management contributes to the longevity of marine ecosystems, ensuring that our waterways remain pristine for future generations of boaters.

Understanding Your Boat's Fuel Components

A deeper understanding of your boat's fuel system is key to optimizing efficiency. Let's break down the main components:

  • Fuel Lines : These are the vessels through which fuel travels from the tank to the engine. Ensuring they are clear of blockages and in good condition is vital for efficient fuel flow.
  • Fuel Tank Connectors : These connectors must be secure and leak-free to prevent fuel loss and potential environmental hazards.
  • Fuel Filters : Regularly replacing fuel filters is crucial. A clogged filter can lead to inefficient fuel burning, reducing performance and increasing consumption.
  • Fuel Hoses : Inspect these regularly for cracks or wear and tear. A compromised hose can lead to fuel leakage and reduced pressure, impacting efficiency.
  • Carburetors and Fuel Injectors: Keeping these clean ensures the right amount of fuel is mixed with air for efficient combustion.

Boat Fuel System Essentials: Tips & Tricks

Maximizing fuel efficiency isn't just about understanding your boat's mechanics; it's also about adopting smart boating habits:

  • Consistent Engine Maintenance: Regularly service your engine to ensure it's running efficiently. This includes timely oil changes, spark plug replacements, and air filter cleanings.
  • Optimize Your Driving Habits: Avoid rapid acceleration and maintain a steady cruising speed. Higher speeds generally consume more fuel.
  • Properly Plan Your Trips: Efficient route planning can reduce travel time and fuel consumption. Avoid areas with heavy traffic or strong currents.
  • Lighten Your Load: Excess weight can significantly increase fuel consumption. Only carry necessary equipment and supplies.
  • Use the Right Propeller: Ensure your boat has a propeller that matches your engine's specifications. The wrong propeller can cause the engine to work harder, using more fuel.
  • Monitor Fuel Usage: Keep track of your fuel consumption to identify any unusual changes that could indicate a problem with the engine or fuel system.
  • Upgrade to Fuel-Efficient Models: If your engine is older, consider upgrading to a newer, more fuel-efficient model . Technological advances mean newer engines often use less fuel for the same power output.

Implementing these tips can significantly improve your boat's fuel efficiency, leading to a more enjoyable and cost-effective boating experience.

Fueling Your Boating Adventures Efficiently

Maximizing fuel efficiency in your outboard motor is a smart and responsible approach to boating. By understanding the importance of fuel components and implementing practical efficiency tips, you can enjoy your time on the water more sustainably and cost-effectively. Questions about boat fuel? Contact us today.

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  • Mar 11, 2024
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yacht outboard fuel consumption

yacht outboard fuel consumption

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Yacht fuel cost calculator - how to estimate the costs.

Yacht Fuel Cost Calculator - How to Estimate the Costs

Yacht captains have many responsibilities when it comes to the management of their vessel. One of them is keeping track of expenses, which is why it is important to familiarize yourself with the vessel’s operational costs. Keeping a luxury superyacht afloat isn’t cheap, and many claim that the average annual cost ranks up to 10% of the vessel’s price.

From these expenses, a significant portion goes to fuel. Filling up the tank of your boat is quite pricey, which is why a growing number of boat owners want to know exactly how much they are looking to spend for their upcoming voyage. This is also important for people who want to charter a boat for their holiday.

If you’re wondering how to best estimate the costs involved, you’re in the right place. This article will help you calculate your vessel’s yacht fuel cost while giving an overview of all the criteria used as variables. To make the process even easier, we link to a yacht fuel cost calculator to help you get an indication of the expenses you’ll need to cover. Let’s delve in!

Yacht fuel cost calculator

How to estimate yacht fuel costs, how much fuel does a yacht use.

  • Price of boat fuel per gallon?

Yacht fuel formula

The easiest way to calculate your fuel costs is by using a yacht fuel cost calculator. There is a great calculator available here in case you want to save time and get an approximate estimation.

yacht fuel cost calculator

As you can see, the yacht fuel cost calculator has many variables which you need to be aware of before you set out to calculate the approximate price. This is what we will be dealing with in the next few chapters.

To help you get a better understanding of the calculation process we will do things manually while giving you the exact formulas used to calculate your vessel’s fuel needs. Therefore, make sure you keep on reading.

There are several things you need to keep in mind when you first set out to estimate the total fuel cost for your next voyage. These are summarised in the following points:

  • Distance of journey - The total amount of nautical miles (or km)
  • Cruising speed - The (average) speed of your vessel (in knots or km/hr)
  • Fuel consumption - Understanding how many gallons (or liters) of fuel are consumed per hour
  • Yacht fuel price - Understanding the average market price per gallon of fuel

The first two points depend solely on your needs and personal preference, which means that they are more flexible on a subjective basis. The latter two points may require a bit of research, especially if you’re not familiar with the engine of the vessel.

In the following sections, we will delve deeper into each of the points mentioned above, and offer the required formulas to help you calculate yacht fuel cost.

Calculating distance and speed

To understand the exact distance you are looking to cover in your next voyage, you can simply use Google Maps to plan your route. The following video explains the process in detail.

As soon as your route is planned out, you can measure the distance as well, selecting the preferred method of calculation. In our case, it is best to measure in nautical miles (1nm=1,85km), as this metric is more commonly used among sea men. The yacht fuel cost calculator above has an embedded map that helps you pinpoint the journey you want to make.

Next comes the cruising speed. The number is mostly calculated in knots (nautical miles/hr). The speed with which the vessel will cruise depends on the captain onboard, but is often influenced by the owner and guests onboard. You can make a rough estimation of this number based on previous trips.

Next, we need to calculate the amount of fuel that you will likely need. To do this we need to understand the engine type, its horsepower, and several other factors.

Let’s take a marine diesel engine for example. These engines are very common on motor yachts and consume approximately 0.4 pounds of fuel per hour for each unit of horsepower. You can find fuel consumption info for your specific engine by looking it up on the web or by calling the service number.

Once you know the fuel burn rate, it’s best to add a relative error margin of 10% based on minor factors. These include weather conditions, vessel size, and drag, all of which can increase the fuel burn.

How much fuel does a yacht use per hour?

Now that you know all the variables you can go ahead and calculate the amount of fuel that your yacht will need.

  • Start by calculating the fuel burn per hour based on the horsepower of the engine.
  • Add a multiplier based on the cruising speed of your vessel.

A vessel with a diesel engine of 300 horsepower will most likely burn 16-17 gallons per hour, which you can then use as a guideline when calculating the travel time based on the nautical miles you are looking to cover.

Superyachts are consuming much more fuel. An average 70-meter luxury yacht will burn around 130 gallons per hour with the engines running, while the amount increases significantly when the ship is moving. On average, you are looking at ±€2000 per hour (±1000 gallons) to achieve a speed of 20 knots. Of course, the higher the cruising speed, the more fuel you will be burning per hour, which in turn makes each hour at sea more expensive.

How much does boat fuel cost per gallon?

yacht fuel cost calculator

The exact price you are looking to pay per gallon depends on the marina you find yourself in. By looking at several price points of marinas, we get the following:

  • Average diesel prices range from $3.2-$3.9 per gallon
  • Average petrol prices range from $7.2-$7.8 per gallon

Note that discounts usually apply whenever you choose to purchase large quantities of fuel.

Why is boat fuel so expensive?

Marine fuel pricing is heavily inflated due to low supply and high demand. In short, the limited number of fuel stations at marinas have to service all the yachts that dock, which leads to a no-choice monopoly.

That said, yacht owners are usually not that concerned about the small price spike that marinas charge as an extra. If anything, they are happy to pay due to the convenience of the service.

How much fuel does a yacht hold?

Once again, the answer to this question depends on the size of the vessel. Smaller yachts can hold around 1300 gallons of fuel, while the bigger vessels can store up to 100,000 gallons. The ship’s engineers should be able to provide this number for the vessel you command.

Now that we have a better understanding of all the variables that determine the cost of fuel, we can go ahead and take you through the calculation process step by step.

First, know the total duration of your cruise. To obtain this information, divide the number of nautical miles by the cruising speed of your vessel (knots). For example, if you want to make a journey that totals 150 nautical miles while traveling at 20 knots, the yacht fuel formula looks as follows:

Total duration = 150 nm / 20kn

Total duration = 7,5 hrs

Note that the amount of fuel consumption may end up higher than expected if:

  • Sea and weather conditions are not favourable
  • You plan to make short stops along the way while the engine keeps running

Next, what you want to do multiply the number of hours by the number of gallons that your engine burns on an hourly basis while moving at the speed you previously indicated. If we take, as an example, the superyacht mentioned in the previous examples, we would make the calculation as follows:

7,5 hrs x 1000 gph = 7500 gallons

Now assume that you will also make two stops along the way, an hour and a half each, in order to let the guests enjoy their time; maybe ride a jet ski.

You then multiply the added number of hours with the consumption rate of a running engine. In this case:

3 hrs x 130 gph = 390 gallons

All that is left to do now is add up the total amount of fuel needed and multiply the number with the price per gallon.

(7500+390) x $3,5 = $27615

In this example, the final cost of your will set you back a little bit more than 27 thousand dollars. Just to be safe, calculate the additional 10% (margin of error) to be prepared against unexpected mistakes. This added amount is not necessarily an ad-on when you consider chartering. Private yacht owners, however, should add the amount to their final cost.

And that's it! You should now have a better idea on the steps you need to follow to calculate the fuel costs for your yacht. While there is quite a bit of information you should keep in mind, it is best to plan out everything with detail to avoid unforeseen costs. If you enjoyed this article, check out our blog post on yacht electrical systems as well.

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Cox 350 Diesel Outboard

  • By Capt. Chris Caswell
  • May 6, 2024

Cox 350 diesel outboard

The very phrase “diesel outboard” seems like an oxymoron. Diesels, by and large, are clunky, smelly, low-powered and oily creatures that reside deep in the bilges of yachts. Figuring out how to hang one on the stern of a recreational boat boggles the imagination.

But think of it this way: as a quick-revving 350 hp powerhouse with far lower fuel consumption, nearly double the torque of comparable gas outboards, and eco-friendly too.  

Let me introduce the new Cox Marine 350. A follow-up to the Cox 300 diesel outboard , this amped-up version from UK-based Cox Marine is making large inroads into the US market, where builders such as Jupiter, Freeman, and Intrepid are offering them to power center-consoles and more.  The US Coast Guard already installs them on Boston Whaler 37s, and the Fort Lauderdale Marine Patrol powers a pair of RIBs with the 350s.

Twin Cox 350 diesel outboards

This purpose-built V-8 features twin turbos. The powerhead and direct-drive crankshaft is vertical, bathed in oil for longevity, which allows a narrower package for multiple-­outboard rigs. It has a 1.25-inch-diameter prop shaft with 19 splines, so a wealth of standard props are available.

More important, this 350 has immense torque: A ­Yamaha 425 hp gas outboard puts out about 400 pound-feet, while the Cox 350 offers 776 pound-feet to quickly jump a big ­center-console full of ­anglers onto plane.  

While doing that, it’s saving on fuel. The aforementioned 425 hp gas outboard burns about 37 gph at wide-open throttle, according to published tests, while the Cox uses 21 gph at max speed, according to our test aboard a Hammercat. That means less of a dent in your credit card for fuel, and you can range farther on the same size tank as well.

Speaking of fuel, the Cox ­diesel-powered 350 can also run on hydrotreated vegetable oil, a synthetically produced fuel that is processed using renewable waste lipids without using petroleum resources. It even runs on jet fuel, available everywhere in the world.

Cox made it easy to switch to this diesel. The 350 has three shaft lengths (25, 30 and 35 inches) for varying transoms, and the 30-inch bolt pattern is universal: Lift off your current gas outboard and bolt on a Cox—no rebuilding transoms. Because the Cox 350 is NMEA 2000-compatible, it networks with most models of MFDs, and each engine comes with its own full-color LCD engine ­display, touchscreen optional. 

The 350 has wireless start, so you can drift-fish and then light the fires from anywhere on board. There’s also a man, oops, person-overboard detector that shuts down the engines if someone goes into the drink.

The standard Optimus electric steering is programmable: Set the lock-to-lock turns for maneuvering or long runs, as well as stiffer or lighter “feel.”

Read Next: Reasons to Repower Your Boat With an Outboard Engine

Display for the Cox 350 diesel outboard

If you’re used to gas outboards, you’ll love the flat five-year/1,500-hour warranty and, even more, the 250-hour service interval, which is just for fluids and adjustments—no lengthy shop time. And Cox has created a global ­supply ­network for full parts and ­service support.

We ran the Cox 350 on a Hammercat 35, a new center-console catamaran from South Africa, which is ­challenging the North American cat world. With the 350s hung on the widely spaced transom, we were running with nearly full twin 200-gallon tanks and a handful of husky guys: all-up weight around 9,000 pounds.  

Cut to the chase: In lumpy water, we topped out at 50 mph (44 knots), but the ­convincer is that we could cruise ­comfortably on plane at ­23-ish mph (20-ish knots) while ­sipping just 13.3 gph. For the mathematically challenged, that’s a range of 600 nautical miles! 

Hammer down a bit more, and 30 knots would get us to faraway fishing grounds at 29 gph. At that speed, the Cox 350s were really quiet too, registering just 63 dB(A) on my sound meter at the helm, where we’re talking normally.

The Cox is also good for the world, with about 36 percent less emissions than a similar gas outboard, according to Cox. It is certified EPA Tier 3, RCD II, and IMO II, making it the most environmentally friendly high-horsepower outboard available.  

Quiet, powerful, buckets of torque, no smoke, user-friendly, and low on fuel consumption. The Cox 350 diesel outboard might be the best British import since The Beatles.

Specifications

350
776 lb.-ft.
60-degree V-8
266 cu. in./4.4L
866 lb.
1.46:1
5-year recreational
  • More: Boats , Cox Marine , diesel , Engines , May 2024 , outboards

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Outboard vs. Inboard: Which Motor is Right for You?

outboard vs inboard

Many family boats, including bowriders , deck boats and cabin cruisers , are offered with a choice of outboard or inboard power. When both options are available, is there a better choice between the two? Let’s take a look at inboard vs. outboard boat motors , and dig deeper into the advantages and disadvantages of each type of power.

inboard vs outboard

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What are the Key Differences Between Inboard and Outboard Motors?

Family boats with inboard power are almost always equipped with a sterndrive (sometimes called an inboard/outboard or I/O) powertrain, which combines an automotive-type engine mounted inside the boat with a steerable and trimable drive unit mounted on the stern (the back) of the boat. The exception would be for a dedicated watersports tow boat , which has an inboard engine turning a propeller under the boat, with steering control provided by a rudder.

Sterndrives are currently offered from 200 horsepower to 430 horsepower, but many compact runabouts on the pre-owned market may be powered by a 130-horsepower sterndrive that is no longer in production. An outboard motor is a dedicated marine engine that is attached directly to the stern of a boat.

Outboards are available from tiny 2-horsepower kickers to 600 horsepower, but for family boating the range is typically 90 to 300 horsepower. As outboard motors have become more powerful, they are gaining popularity on larger cabin cruiser and day boats that once were always equipped with inboard engines. These may be rigged with three or four outboards that combined make more power than the biggest pair of sterndrive engines available, resulting in performance that was once unimaginable.

inboard vs outboard pros and cons

Initial Cost Comparison

It seems natural to make a cost comparison based on horsepower—a 250-horsepower outboard to a 250-horsepower sterndrive in the same boat—but it’s smarter to make that comparison based on performance.

In this example, a 200-horsepower outboard will usually match the performance of a 250-horsepower sterndrive, simply because the outboard weighs less, and because that weight is more efficiently positioned behind, rather than inside, the boat. This rule of thumb holds true as you move up and down the horsepower scale. However, even with less horsepower the outboard-powered boat will often cost a little more—2 to 4 percent—than a similar boat with a sterndrive.

Inboard vs. Outboard Maintenance Costs & Ownership

Because it will usually weigh less and be a more-efficient design, an outboard motor will typically deliver better fuel economy than a sterndrive. Both will require similar annual maintenance, except that in cold climates the cooling system of most sterndrive engines needs to be flushed with antifreeze solution, usually by a marine service center.

  • An outboard is self-draining and many owners can accomplish their own off-season service.
  • Sterndrives once had a reputation for being more prone to corrosion-related issues in salt water, but corrosion resistance is much improved on modern engines and outdrives, and many can be equipped with a closed cooling system that keeps most saltwater out of the engine.
  • However, most sterndrives can not be tilted completely out of the water, while most outboards can clear the water when tilted all the way up. This is an advantage for the outboard if the boat is docked or moored full time in saltwater, as it prevents marine growth and corrosion from occurring on the drive.

outboard vs inboard maintenance costs

Serviceability

Because the entire engine is outside the boat, an outboard is easier to service than an inboard. With the boat on a trailer you can simply stand next to the outboard.

Servicing the inboard requires working under an engine hatch, often in pretty cramped confines. When an outboard is damaged or simply worn out, it is relatively easy to re-power the boat with a new outboard. Repowering an inboard boat is also an option, but a more-challenging project.

  • Boat Motor Maintenance & Engine Care Guide

Additional Pros & Cons

An outboard has many advantages over a sterndrive:

  • It’s lighter, faster, more efficient, and easier to service;
  • Because the entire engine is located outside the boat, there’s more room in the boat for seating or gear storage;
  • A new outboard is cleaner, quieter and more powerful and feature-laden than the motors offered just a few years ago, all reasons they have become more popular on more types of boat.

A sterndrive does have some advantages, however:

  • The drive unit is low on the transom, which permits a full-width boarding or swim platform that’s not cluttered by an outboard motor. This can really improve the lounging experience, and many people find this uncluttered look much more attractive.
  • The sterndrive engine may also be covered by a padded sun lounge, another feature many owners appreciate.
  • When equipped with a drive with forward-facing propellers ( Volvo Penta Forward Drive or MerCruiser Bravo Four ), the boat can be used for wakesurfing , an activity that’s not safe—or even legal on most waters—behind a boat with a traditional sterndrive or an outboard because of the proximity of the spinning propeller to the surfer. For many boating families, the ability to wake surf is reason alone to select an inboard with forward-facing props.

Read Next: Comparing Jet Boats vs. Sterndrive (Prop) Boats

You May Also Like:

  • Choosing the Right Fuel & Oil for Your Marine Engine
  • How to Make Your Boat Go Faster
  • Boat Repair: Choosing a Marine Mechanic
  • Find the Right Boat for Your Lifestyle

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Former Mercury Marine employees describe anxiety, confusion after hundreds of layoffs

yacht outboard fuel consumption

FOND DU LAC (NBC 26) — Former employees at Mercury Marine describe anxiety and confusion after hundreds of layoffs at the company's Fond du Lac headquarters.

  • Mercury Marine announced nearly 300 layoffs through July.
  • The company previously laid off more than 100 employees earlier in the year.
  • The company cited "softening of consumer demand" as a reason for layoffs.

(The following is a transcription of the full broadcast story with minor edits for the web.)

I met a former employee who worked as a forklift driver at Mercury for more than a year and a half before being laid off.

He asked us not to identify him.

He said he was laid off in April, when we previously reported Mercury laid off more than 100 employees.

"It was a big stress on me and my family," the employee said.

Last week, Mercury announced another nearly 300 layoffs from now through July.

The former employee said it affected several of his former coworkers and friends.

"They're kind of worried about, is there going to be another, another round after this?" the employee said.

He said many current employees are anxious about their job security.

"It kind of seems like morale is going down, as far as working at Mercury," the employee said.

The employee said he was told he was being laid off because of excess inventory.

In a statement last week, Mercury Marine said it remains one of the largest employers in the Fox Valley, and the layoffs follow "softening of consumer demand in some of our markets mainly as a result of continued high interest rates and near-term reductions in boat production by Mercury’s boat builder partners." (See full statement below)

But, employees I spoke with in person and on the phone said they're confused .

The employee I sat down with told me Mercury Marine held a quarterly meeting with employees the day after he was told he would be laid off.

"They just talked about how well everything's selling and in certain areas, and what they're planning to do in the future, and how they're bringing some of the processes back to mercury and not outsourcing them anymore," the employee said.

The employee said the company didn't mention layoffs in that meeting.

"It just seemed like a shot in the gut, like, 'Oh, you're bringing processes in, but you're laying people off. Like, how does that necessarily work?" the employee said.

I reached out to Mercury Marine again after speaking with this employee, but they said they’re not sharing anything more at this time.

I also spoke with a representative from the union that represents Mercury Marine’s workers, but he declined to comment on the layoffs.

Mercury Marine's statement following announcement of layoffs:

Mercury Marine has announced a reduction in workforce of 300 employees at its Fond du Lac global headquarters, which will take place now through July, as well as some adjustments to overall operations in Wisconsin, St. Cloud, Florida, and Juarez, Mexico.  These actions were taken due to softening of consumer demand in some of our markets mainly as a result of continued high interest rates and near-term reductions in boat production by Mercury’s boat builder partners.  Mercury Marine's industry-leading products continue to gain market share around the world but at this time this is not sufficient to fully offset the overall market headwinds.   Mercury remains one of the largest employers in the Fox Valley, and in the state of Wisconsin, with more than 3,500 full-time employees in Fond du Lac, and accounts for $5B in annual economic impact to the Fond du Lac community.

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Singapore rushes to clean up oil slick after boat hits stationary fuel supply ship

Aptopix singapore oil spill.

KUALA LUMPUR, Malaysia (AP) — An oil spill caused by a dredger boat hitting a stationary cargo tanker has blackened part of Singapore’s southern coastline, including the popular resort island of Sentosa, and sparked concerns it may threaten marine wildlife as a clean-up operation was underway Sunday.

The Netherlands-flagged dredger Vox Maxima struck the Singaporean fuel supply ship Marine Honor on Friday. It damaged the cargo tank on Marine Honor, which leaked oil into the sea.

Singapore's Maritime and Port Authority said in a statement late Saturday the oil leak from the vessel had been contained, and that the oil that escaped from the damaged tanker had been treated with dispersants.

But due to the tidal current, it said the treated oil had landed along shorelines including at Sentosa and other southern islands, a nature reserve and a public beach park. Sentosa, which attracts millions of visitors annually, houses one of Singapore’s two casinos, golf courses and Southeast Asia’s only Universal Studios theme park.

Part of the beachfront at the public park and at the nature reserve have been closed to facilitate clean-up efforts, it said. The Sentosa beach will remain open to the public but sea activities and swimming are prohibited.

On Sunday, workers in orange suits were seen scooping up sand in a clean-up operation at an empty beach in Sentosa. Black water washed up on the oil-stained shore.

Authorities have deployed 18 crafts for the clean-up efforts and laid close to 1,500 meters of container booms, temporary floating barriers to trap the oil spill.

“More will be laid over the next few days to prevent further spread of oil onto the shore, and facilitate the recovery of the trapped oil off the affected shorelines and lagoons to prevent them from going back to sea,” the statement said.

Conservationists and biologists are monitoring the full extent of the damage on marine and wildlife.

Local conservation group Marine Stewards reportedly said there were photos of dead fish, otters and kingfishers covered in oil slick.

Group founder Sue Ye told Singapore Straits Times that oil spills smother and suffocate fish, birds and marine animals that have to go to the surface for air, such as turtles and dolphins.

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4 stroke 498 cc - 30 cid 9.45 LPH
4 stroke 996 cc - 71 cid 18.5 LPH
2 stroke 848 cc - 52 cid 27.5 LPH
4 stroke 1.6 L - 97 cid 34.4 LPH
4 stroke 1.8 L - 112 cid 36.6 LPH
4 stroke 2.7 L - 163 cid 58.6 LPH
4 stroke 2.8 L - 170 cid 61.6 LPH
4 stroke 4.2 L - 254 cid 72.6 LPH
4 stroke 3.3 L - 204 cid 66.0 LPH
4 stroke 4.2 L - 254 cid 89.9 LPH
4 stroke 4.2 L - 254 cid 98.3 LPH
4 stroke 5.3 L - 325 cid 129 LPH
4 stroke 5.6 L - 339 cid 140 LPH -

Factors such as propeller pitch, weigth, hull / water conditions, etc. may affect the consumption figures.

0.38 0.45 0.75 1.50 2.65 4.20 4.70 5.70 6.60 8.00 8.70 9.45 LPH

0.75 1.15 2.70 3.40 4.50 6.40 7.20 8.70 9.80 12.0 15.1 18.5 LPH

1.89 2.20 3.80 5.30 8.30 11.0 12.5 15.5 17.0 18.1 22.2 27.5 LPH

1.33 1.50 2.60 4.20 7.20 9.50 11.7 14.4 17.8 22.3 27.2 34.4 LPH

1.50 1.89 2.25 3.80 7.20 9.80 13.2 17.4 21.9 24.2 28.7 36.6 LPH

1.90 2.80 4.50 8.00 11.3 15.9 19.7 23.0 30.2 39.7 49.9 58.6 LPH

1.80 2.70 4.90 8.70 11.3 14.7 19.3 26.1 32.2 44.6 56.3 61.6 LPH

3.00 6.05 10.2 13.2 19.7 25.3 31.7 35.9 48.8 54.4 62.3 72.6 LPH

3.00 4.90 8.30 12.1 14.7 17.4 21.6 27.9 38.2 45.0 54.4 66.0 LPH

3.00 4.55 7.90 13.6 20.0 24.2 32.1 42.7 56.7 65.8 77.9 89.9 LPH

3.00 4.90 8.30 14.0 19.7 25.0 36.3 44.6 58.6 73.0 88.8 98.3 LPH

3.20 5.70 9.45 17.8 24.0 37.0 41.9 53.2 68.0 85.8 111 129 LPH

3.50 7.90 10.2 17.0 23.2 32.1 44.4 55.5 72.0 89.0 115 140 LPH

IMAGES

  1. Outboard Motor Fuel Consumption Calculator

    yacht outboard fuel consumption

  2. Mercury Outboard Fuel Consumption Chart

    yacht outboard fuel consumption

  3. Yamaha 4-stroke Outboard Fuel Consumption Chart

    yacht outboard fuel consumption

  4. Measuring your Yacht Fuel Consumption per Hour

    yacht outboard fuel consumption

  5. Outboard Motor Fuel Consumption Calculator

    yacht outboard fuel consumption

  6. How Important Is Fuel Economy?

    yacht outboard fuel consumption

VIDEO

  1. Croatia Luxury Yacht Charters Brokers Fuel consumption 30sec

  2. 🚤🟢DISCOVER the BEST SMALL OUTBOARD MOTOR (and WORST🔴) 2 to 3.5 hp OUTBOARD motor comparison

  3. Torqeedo Australia (Etchells sailboat)

  4. X 94

  5. Luxury Yacht

  6. Boat Digital Box лод.компьютер с N2K + Honda BF50D / Test of Boat Digital Box with Honda BF50D

COMMENTS

  1. Calculating Boat Fuel Consumption for Smart Boating

    To navigate through this maze, use this formula to estimate your boat or engine's fuel consumption: GPH = (specific fuel consumption x HP) / Fuel Specific Weight. Weight: Gas = 6.1 lb. per gal. Diesel = 7.2 lb. per gal. The key to unlocking maximum horsepower lies in these formulas, optimized for the engine's peak performance at wide-open ...

  2. Feel The Burn: The Fuel Consumption Equation

    Let's look at some actual numbers from a full-displacement trawler in the 40- to 50-foot range: 7.5 knots @ 3 GPH = 2.5 nMPG. If we push for a little more speed the fuel burn changes: 9 knots @ 11 GPH = 0.8 nMPG. Notice that by slowing down 1.5 knots, this boat increases its fuel economy almost 300%. Semi-displacement.

  3. Boat Fuel Consumption Chart: How to Save Money on Boat Gas

    Bring the Boat on Plane, then Leave the Throttle Alone. 3. Tweak the Trim. 4. Make Sure You Have the Right Propeller. 5. Keep the Bottom of Your Boat Clean. Last Updated on November 3, 2023 by Boatsetter Team. Boat fuel consumption can be a rather significant expense, and it's one that goes up as gas prices rise.

  4. Chart Listing the Approximate Fuel Consumption of Outboard Motors

    So a 250-horsepower outboard motor, at Wide-Open Throttle (6000 rpm), burns about 25-gallons per hour It's reasonable to conclude that at lower rpm, less horsepower is generated and less fuel is burned. Know that an outboard motor is most efficient at 75- to 80-percent of its rated output and revving back even a little yields significant fuel ...

  5. Calculating Boat Fuel Consumption

    Calculating a boats fuel consumption proves important to boaters for number of reasons. With knowledge of a boat's fuel economy-how much fuel the boat burns per mile or nautical mile of travel-boaters can estimate the range they can safely expect to run. Some boaters go as far as to develop a boat fuel consumption chart for their boat.

  6. Fuel Calculator

    Then enter the speed, fuel consumption, and fuel cost to determine the total cost of the trip. Example 1: A fast 30m yacht cruising at 20 knots (Lady Amanda) will consume roughly 400-500 l/hour (more depending on engine type). Exampe 2: A typical displacement yacht may cruise at 12 knots and consume 300 l/hour.

  7. BoaterInput Fuel Consumption Calculator

    So, to convert fuel consumption into gallons, you simply divide by the fuel weight of 6.1 lbs per gallon for gasoline and 7.2 lbs for diesel. But this still doesn't get us where we need to be. That is because, unless you are a boat racer, most do not run their engine at WOT 100% of the time.

  8. A Comprehensive Guide to Boat Fuel Consumption

    Fuel Consumption (Gallons Per Hour) = (Fuel Used x Horsepower) / Fuel Specific Weight. So, if you have a 300 HP engine operating with gasoline, fuel consumption would be, GPH = (0.5 x 300) / 6.1. GPH = 24.5. It means your engine uses 24.5 gallons of gasoline per hour. Remember that your engine and vessel should be well-maintained for an ideal ...

  9. Fuel consumption calculator

    Fuel consumption calculator - MerCruiser - Cummins MerCruiser - Crusader - Volvo Penta Diesel - Mercury - Evinrude - Honda Marine - Yamaha Marine - Suzuki Marine - Tohatsu - Johnson - Outboards | GPH MPG LPH KPL

  10. Boat Fuel Economy

    Boat-Fuel-Economy / Fuel Consumption Charts & Calculator Outboard motors and Boat motors | Inboard: MerCruiser - Volvo Penta Diesel Marine engines | Outboard: Mercury ...

  11. Chart

    Fuel consumption Chart - Mercury - Evinrude - Honda Marine - Yamaha Marine - Suzuki Marine - Johnson - Outboard Motors | MerCruiser - Volvo Penta Diesel Inboards | GPH MPG LPH KPL Miles per Gallon - Gallons per Hour | Kilometers per Liter - Liters per Hour. Outboard : Evinrude .

  12. Boat Fuel Consumption Calculator

    The following formula is used to calculate a boat's fuel consumption. FC = (SFC * HP) / FSW FC = (SFC ∗ H P)/FS W. Where FC is the fuel consumption at max throttle (gallons/hour) SFC is the specific fuel consumption (lbs per HP) Gas = .50 lbs per HP. Diesel = .40 lbs per HP. HP is the engine horsepower. FSW is the fuel specific weight (lbs ...

  13. Maximize Your Fuel Economy—Part I, Outboards

    Fuel economy in the vast majority of outboard powered planing boats is worst between 1500 and 3000 rpm, when the boat is trying to get on plane—the bow is high, the stern is low or squatting and the boat is pushing a huge wave. Most of the energy of the fuel is being used to dig a hole in the bow wave.

  14. How Much Fuel Does A Boat Use Per Hour? Guide + Examples

    For example, if the boat travels at a speed of 20 knots and has a fuel burn rate of 0.1 gallons per horsepower per hour, and the engine has 200 horsepower, the boat will consume 20 gallons of fuel per hour. In conclusion, understanding fuel consumption in boats requires knowledge of several critical factors, including boat type and size, engine ...

  15. Fuel Efficient Yachts: From Solar Power To Modern Outboards And

    The Greenline Hybrid yacht line is currently available in eight different models, including the sleek NEO sports boat, the family cabin cruising 33, 39 and 40, and the 45 Fly, 48 Fly, 48 Coupe and the 65 OC. All of these models achieve industry leading fuel efficiency. Greenline 40 Hybrid Diesel-Electric Solar Power Boat.

  16. Calculating Boat Fuel Consumption ️ Boat World

    Gen­er­al­ly, a small out­board motor­boat uses about 1 to 2 gal­lons of fuel per hour, while a larg­er motor­boat with an inboard engine can use up to 20 or more gal­lons of fuel per hour. Type of fuel used can also affect the amount of fuel con­sumed.

  17. Boat Fuel Calculator and Consumption List

    The fuel consumption of any yacht, can vary widely based on several factors including the yacht's size, engine type, cruising speed, and conditions under which it is operated. The figures above are average calculated. Boat Name Average Fuel Consumption (liters per hour) Waterdream: 200-300L: Mangusta 108: 990L: CRN 130: 650L: Astondoa 102 GLX:

  18. The Outboard Expert: Fuel Economy Secrets

    May 30, 2007. As gas prices soar, even this little can can cost a boater $24 to fill. High gas prices took some of the fun out of the Memorial Day weekend, which marks the beginning of the pleasure-boating season here in the Midwest. As gas approaches $4.00 per gallon, even owners of small runabouts are looking at a $150 bill for a fill-up.

  19. Measuring your Yacht Fuel Consumption per Hour

    The efficiency of boat fuel is measured in pounds of fuel that are used in an hour per horsepower. In order to be able to read the calculation right, any boat owner should know that gasoline is almost 6.1 pounds per gallon while diesel is 7.2 pounds per gallon. Usually, if you consider that all sea conditions are pristine, the fuel consumption ...

  20. Boat Fuel Efficiency

    This includes timely oil changes, spark plug replacements, and air filter cleanings. Optimize Your Driving Habits: Avoid rapid acceleration and maintain a steady cruising speed. Higher speeds generally consume more fuel. Properly Plan Your Trips: Efficient route planning can reduce travel time and fuel consumption.

  21. Yacht Fuel Cost Calculator

    To obtain this information, divide the number of nautical miles by the cruising speed of your vessel (knots). For example, if you want to make a journey that totals 150 nautical miles while traveling at 20 knots, the yacht fuel formula looks as follows: ‍. Total duration = 150 nm / 20kn. Total duration = 7,5 hrs.

  22. Cox 350 Diesel Outboard

    The Cox 350 diesel outboard is quiet and powerful and offers buckets of torque along with efficient fuel consumption. By Capt. Chris Caswell May 6, 2024 The Cox ­diesel-powered 350 can also run on hydrotreated vegetable oi. Courtesy Cox Marine. The very phrase "diesel outboard" seems like an oxymoron. Diesels, by and large, are clunky ...

  23. Verado® 250-300hp Outboard Motor

    Verado® - For boaters who refuse to compromise, Mercury V8 250 and 300hp Verado® outboards represent the pinnacle of superior outboard design and performance. They deliver exhilarating acceleration and top speed, with the power and reliability to make runs over long distances and choppy water. The Mercury-exclusive Advanced MidSection (AMS) and under-cowl noise management set the standard ...

  24. Outboard vs. Inboard: Choosing the Right Boat Motor

    However, even with less horsepower the outboard-powered boat will often cost a little more—2 to 4 percent—than a similar boat with a sterndrive. Inboard vs. Outboard Maintenance Costs & Ownership. Because it will usually weigh less and be a more-efficient design, an outboard motor will typically deliver better fuel economy than a sterndrive.

  25. Comparative Analysis of CO2 Emissions, Fuel Consumption, and Fuel Costs

    The cost implications of the new regulations may lead to an increase in emissions as engines with lower fuel consumption are chosen, i.e., larger marine engines. Alternative approaches are needed to reduce CO2 emissions and fuel consumption, which could ultimately lead to hybrid propulsion for ships.

  26. Former Mercury Marine employees describe anxiety, confusion ...

    Mercury Marine has announced a reduction in workforce of 300 employees at its Fond du Lac global headquarters, which will take place now through July, as well as some adjustments to overall ...

  27. Video. Singapore starts to clean up oil slick after boat hits

    Video. Authorities in the popular resort island of Sentosa, Singapore commenced the clean-up after an oil spill caused by a dredger boat that hit a stationary cargo tanker on Friday, blackened ...

  28. Singapore rushes to clean up oil slick after boat hits stationary fuel

    The Netherlands-flagged dredger Vox Maxima struck the Singaporean fuel supply ship Marine Honor on Friday. It damaged the cargo tank on Marine Honor, which leaked oil into the sea.

  29. Massive ancient boat found off coast of Mexico island. Look

    A boat, human bones were found World Ancient 50-foot boat — and offerings of human bones — found in Mexico lake. ... UNESCO warns AI could fuel Holocaust denial, anti-Semitism Updated June 18 ...

  30. Yamaha Outboard Fuel Consumption

    Yamaha F 4-stroke Outboard Motor Fuel Consumption Yamaha F 25 hp 9.45 LPH | 70 hp 2-stroke 27.5 LPH | 90 hp 34.4 LPH | 115 hp 36.6 LPH | 150 hp 58.6 LPH | 200 hp VMAX / HPDI 72.6 LPH | 250 hp 89.9 LPH | 300 hp 98.3 LPH | 350 hp 129 LPH Liters per hour | 425 hp 140 LPH Liters per hour | Portable outboard Yamaha 4 - 5 - 6 - 8 - 9.9 - 15 - 20 hp | Also Fuel usage Gallons