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Outboard Boat Motor Guide: Everything You Need to Know

John Sampson

Walking through the boat dealership is an exciting experience. From bay boats to bowriders, cabin cruisers, and yachts, dozens of boat models are available to suit any pastime out on the water, from fishing to watersports.

While most of us focus on the boat we like, few new owners take the same amount of time selecting the right motor for their vessel. The outboard engine is the most common propulsion system for smaller watercraft up to 40-feet.

The outboard sits outside of the boat, hanging from the transom, which is the cross-section at the vessel’s stern. Outboard motors are available for leading manufacturing brands like Honda, Yamaha, and others. They come in various capacities to suit the size of your boat and your activities out on the water.

Choosing the right outboard motor for your boat is essential to getting the most value from your boating experience.

If you choose a low-powered motor, you’re not going to have the performance you need for watersports of navigating rough waters. Too high a capacity means that your boat won’t be able to enjoy the full operating potential of the engine.

We decided to put together this post to give you everything you need to know about choosing the right outboard motor for your boat.

Two-Stroke or Four-Stroke – Which Is the Better Choice?

Outboard motors are available in two-stroke and four-stroke models. The industry seems to agree that the four-stroke motor is the better choice for any boat. However, if we dig into the tech behind these engine configurations, the consensus seems to disappear, and there are several advantages to fitting your vessel with a two-stroke motor.

With a four-stroke motor, you’re getting a similar design to what you expect in a car engine. The engines operate on gasoline, with oil circulating through the system to lubricate the working parts motor.

Two-stroke motors operate on a blend of gasoline and oil, feeding the oil/gas fuel mixture through the carburetor or injectors into the cylinders through intake valves. Carb-based models are somewhat inefficient, and up to 30% of the fuel and oil mix entering the engine escapes unburned.

As a result, manufacturers moved towards direct fuel injection systems to enhance the efficiency of these engines. These systems spray the fuel into the combustion chamber using precision injection timing, with the piton covering the exhaust valve to prevent any fuel escape, improving the motor’s efficiency.

The four strokes per engine cycle, exhaust, and intake occur separately with four-stroke motors. DFI systems tend to be markedly more efficient than two-strokes due to the improved cycling of the pistons and computer management over the valves.

However, it’s important to note that the improvements in fuel injection and engine technology mean that the new generation of two-strokes is almost as efficient and quiet as four-stroke motors.

An example is the Evinrude E-TEC two-stroke DFI motor. This engine injects fuel at twice the speed of standard models, adjusting fuel delivery and the oil-gas mixture required by the onboard engine management system.

The result is an engine with all the power and performance of a four-stroke while running far quieter than traditional two-strokes.

The general reason behind using a two-stroke is that it’s more affordable than the four-stroke, and it offers more power due to the two-piston cycles per engine cycle. However, recent tech developments on four-strokes improve the power and performance of the four-stroke while maintaining efficiency and quiet-running.

As a result, the decision between choosing a two-stroke or four-stroke motor is now a function of what you want to do with the boat and your budget. We all want a four-stroke, but some of us might not have the extra money for it.

With modern DFI two-stroke engines, you get a motor that offers all the performance and efficiency of a four-stroke, with the speed and power you need for powerboating and watersports.

Key takeaways

  • Two-stroke DFI engines offer you a lighter motor with almost the same efficiency and quiet-running capability as a four-stroke.
  • While four strokes are generally quieter, the DFI two-stroke advancements mean that they run at nearly the same decibel output.
  • Two-strokes provide the motor with a better holeshot, but four-strokes are closing the gap to gain the same power and performance as DFI two-strokes.

How to Choose an Outboard Motor

Buying Your Outboard Motor – New or Used?

Like buying a car, you have options to choose a new motor or buy pre-owned engines. When you’re at the dealership, it’s tempting just to add a new motor to your purchase, but you might find a pre-owned motor for half the price, offering you the same performance and service life as a new engine.

However, when you’re buying pre-owned motors, you’ll need to know what you’re looking at when assessing the engine.

If you don’t have any mechanical experience working on boat motors, we suggest you bring along a qualified and experienced mechanic to the viewing. They’ll assess the condition of the engine before you close the deal.

Calculating Outboard Motor Capacity for Your Boat

If you have a 40-foot cabin cruiser, your motor capacity is going to be much higher than for a 16-foot bowrider. So, how do you choose the right motor capacity for your vessel? The sales agent will likely recommend the right motor for your boat if you’re buying from the dealership.

However, if you’re searching on the used market, you’re going to need to do a quick calculation to figure out the right motor capacity for your vessel.

You’ll need to start the calculation by converting the vessel’s weight from tons to pounds.

So, if your bowrider has a dry weight of 1.1-tons, it works out to 2,500-lbs.

For the average performance model boat, like a center console or a bowrider, you’re going to need approximately one horsepower (HP) for 25 to 40-lbs of weight.

Take the boat’s weight in pounds and divide it by 200 (for a 200-HP engine). So, for our 2,500-lbs boat, we get approximately 12.5-lbs of horsepower per pound with a 200-HP engine.

2,500 divided by 125 is 20-HP per pound, and the lower the figure, the higher the engine’s performance. So, dividing 2,500 by 300 gives us 8.33 Hp-p/lb, making for a fast boat that’s ideal for watersports and speed boating.

Why Should I Choose a Larger Outboard Engine?

The motor capacity defines the boat’s power and its performance on the water. If you’re facing a choice between an engine that’s slightly under the recommended capacity or slightly over, we recommend going with the higher power to avoid disappointment out on the water, especially if you’re into watersports or speed boating.

If you have a pontoon boat or slow-moving cruising vessel, then the lower capacity is the better choice as these models do not have the design for high-speed operation. Overall, we recommend going with the higher power if you enjoy watersports and offshore fishing and lower capacity option for inland water bodies and cruiser boats.

What are the Top Features to Look for In an Outboard Motor?

After calculating the right motor capacity of your boat, it’s time to assess the engine’s features. Here’s what you need to look for when choosing the right motor for your vessel.

Electronic Ignition

Ripcords are so 1990s. Today, all the leading motor models come with an electronic start. You either turn a key or push a button and the motor springs to life, with no ripcords required.

When the water is rough, and you need a fast start, electronic ignition can mean the difference between taking water onboard or making a quick escape from the weather conditions.

Power Tilting

Choose a motor offering you power tilting of the engine. This feature electronically lifts the propellers out of the water by tilting the motor forward at the push of a button.

It’s a great feature for fishing in shallow waters to stop the props from agitating the sediment on the bottom, and it also helps with lifting the motor when you’re launching or trailering the vessel.

Power Thrust

This feature is like a “nitrous-oxide canister” in a sports car. It increases a temporary surge of power to the motor to combat strong currents and winds out on the water. The thrust increases the forward propulsion by up to 15% and the reverse propulsion by 60%.

The power thrust also assists with the maneuverability and steering of the boat, making it easy to reach top speeds while maintaining full control of the vessel in demanding water conditions.

Is A Dual Outboard Setup the Best Choice?

Take a drive through the marina, and you’ll see boats with single, double, or even triple outboard motor configurations.

Typically, these engines feature on boats that take to deep water for sports fishing trips. In most cases, the captain won’t use two or three motors simultaneously; they keep the auxiliary motors as a backup in case of mechanical failure of the primary engine while they are out at sea.

Installing a dual-motor configuration to your boat also makes docking that much easier. The propellers revolve in separate directions, allowing for the easy repositioning of the vessel as you approach the dock or slip.

However, if you install dual or triple motors to your boat, it will double or triple the expenditure you make on the motor purchase. You’ll have to decide if the addition of extra engines offers you enough value to justify the increase in your budget.

If you have the budget, a twin outboard setup will always be the optimal choice for most boating applications. It’s important to note that a dual or triple configuration is only useful against mechanical failure if each motor has an independent fuel and power system.

You might find that it’s way more affordable to get a single motor and just upgrade your marine radio system so you can call for rescue if the engine breaks down while you’re out at sea.

Do I Need High-Octane Fuel for the Outboard Motor?

As high-compression motors arrived in the boating industry, early models would experience the fuel combusting too early in the combustion cycle. This pre-ignition problem, otherwise known as “spark knock,” was an irritating noise, and it also damaged the combustion chamber, scarring the cylinder walls and damaging the valve seats.

As a result, manufacturers included additives in fuel to slow the ignition until the spark plug was ready to ignite the fuel. So, today’s modern engines now operate better with high-octane performance fuels, allowing them to handle the higher compression rate.

However, the reality is that using high-octane fuel on your outboard motor isn’t the best choice – for your wallet. These high-octane fuels don’t add any additional performance to the outboard motor, and you’ll get the same power out of using 87-octane as you would with other grades on the 90s.

With the cost of fuel rising in the United States and some states seeing prices at over $4 a gallon, using a lower octane fuel will save you hundreds of dollars over the year.

Boat Fuel Tips

How Do I Select the Right Propeller for My Outboard?

You can think of the propeller on your boat like the tires on your car; it’s where the “rubber meets the road” or, in our case, where the “steel meets the water.” Props are similar to tires in that they come in different designs for different purposes out on the water.

You have dedicated props for performance speed racing, watersports like wakeboarding, and increasing economy. If you’re purchasing your new motor for the dealer, ask them about the prop installed on the engine and the various prop options available.

Most dealers install efficient, mid-range performance props on their motors. So, if you’re buying a boat specifically for watersports, this prop might not be the best option for the task. However, you can negotiate with the dealer, and they’ll likely install any type of performance prop you want on the engine.

Propeller Basics

Fortunately, understanding propeller technology isn’t rocket science. Props change the pitch and diameter of the blades to suit different applications in the water. As you already guessed, the diameter refers to the size of the prop.

The pitch refers to the theoretical distance the prop needs to travel in a complete revolution, provided there is no slippage. The reason why you need to select the right prop for your boat comes down to the fact that motor manufacturers rate an engine’s horsepower at specific RPMs, setting the rpm range for the motor’s top-end operation.

However, the motor can only reach this top-end range if it has the right prop suited to the task. If the prop permits the engine to over-rev, you risk damage to the motor due to the high-revs creating a faster rate of wear and tear on the motor components.

Conversely, if the prop is too large, then the motor will struggle to reach top-end rpm ranges, creating another set of challenges for the engine that might damage its internal components.

Picking the right pop pitch ensures you get the best performance from the engine while protecting the internal components from damage. To test the prop., you’ll need to take the boat out onto the water and open the throttle to the full position.

When your engine runs over the max-rpm range, back off the throttle, reduce speed until the rpm gauge drops to the suggested rpm range recommended by the manufacturer. When you return to shore, check the pitch of the props.

You should have a drop of 200-rpm for each degree of increase in the pitch. Cupped props can reduce rotation by up to 200-rpm. Ask your dealer if they allow you to test the prop. Most dealers will agree, provided you return it to them undamaged.

As long as the propeller reaches the top-end range, but doesn’t exceed the max-rpm value, delivering wide-open RPMs to the bottom of the recommended range provides you with better performance in holeshots. Props offering RPMs toward the top-end of the range generate higher top-end speed.

What to Know About Boat Engine Propellers

The condition of the propeller is more important than the type of prop installed on the boat. Damaged propellers can cause problems with the normal operation of the engine, creating stress in the motor components that cause damage.

We recommend going with stainless steel propellers as they offer you the truest running performance and high strength levels. Aluminum is a cheaper material, sacrificing itself to provide the lower unit better protection.

Four-blade props beat three-blade models in the time it takes to reach planing speeds, midrange speeds, and they offer you better low-speed handling.

How to Choose an Outboard Motor

Easy Outboard Engine Maintenance Tips

When the motor isn’t in use, keep the fuel tank topped to reduce the chances of condensation building on the inside of the tank. If water gets into the engine system, it will require you to bleed the system to get the motor to start.

  • Add fuel stabilizer additives to the fuel tank every time your refuel. It’s critical to do this with ethanol-based fuels to prevent separation and fouling of the fuel system.
  • Inspect your propellers after each trip for damage, dings, pocking, and wear.
  • Inspect the hoses and fittings to ensure there are no leaks.

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John is an experienced journalist and veteran boater. He heads up the content team at BoatingBeast and aims to share his many years experience of the marine world with our readers.

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Engine Types

Now let's look at the three types of engines you'll find on powered boats: outboard, inboard and stern drive engines.

What is an Outboard Engine?

This is an outboard engine. Outboard engines are mounted on the transom of the boat, outside of the boat's hull, which is why they're called "outboards".

Outboard engines are used to both power and steer the boat. To steer an outboard you need to move the entire engine. On smaller boats, this is often done using a hand tiller, while on larger outboards a steering wheel adjusts the direction of the engine.

What is an Inboard Engine?

Inboard engines are located inside the boat's hull. Inboard engines are four-stroke automotive engines that have been modified for use on the water. These engines power a drive shaft that is connected to a propeller.

Unlike an outboard, an inboard engine does not also steer the boat. Instead, inboards have a rudder or rudders that are located behind the propeller and controlled by a steering wheel.

What is a Stern Drive Engine?

The last type of engine is the stern drive, which is sometimes called an "inboard-outboard" because it shares features of both types of engines. Similar to inboards, stern drive engines use a four-stroke automotive engine mounted on the inside of the hull to power the boat.

Like an outboard, there is a drive unit used to steer the boat. To steer a stern drive, turn the steering wheel, which then turns the drive unit, and determines the direction of the boat.

What is a Jet Drive Engine?

A Jet Drive engine uses water to propel and steer the boat. Water enters in through an intake on the bottom of the boat and is accelerated through the jet drive unit at the transom, thrusting the boat forward.

Steering is achieved by changing the direction of the stream of water as it leaves the jet unit. REMINDER - Because steering is dependent on the water jet, Jet Drive engines will lose some steering control at low speeds.

Boat Hull Types

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Top 5 Outboard Motor Brands Ranked

by Mobile Motorboat Mechanics | Feb 5, 2023

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1. Yamaha Outboard 

Known for their reliability, Y am aha Out board Motors are the ideal choice for any adventurous bo ater looking for consistent performance and superior power . With advanced designs , these out board motors deliver an incredible combination of power , torque , refined performance and fuel efficiency . Built with innovative technology , Yamaha out board motors are designed to maximize power , reliability and fuel efficiency when you ’ re out on the water . Models in both two – stroke and four – stroke configurations offer superior torque and smooth acceleration that are sure to make your bo ating experience even more enjoyable .

On top of that , Yamaha ’ s unique complementary systems ensure maximum control and responsiveness , giving you complete confidence when the waves get rough . Back ed by a 3 – year limited warranty and unbeat able quality , Yamaha Out board Motors provide depend able and powerful performance for your next n autical adventure .

2. Mercury Outboards

With a variety of different options, Mercury Outboard Motors are the best choice for any type of boating experience, offering high-performance engines and innovative designs to make your next journey a memorable one. From leisurely days on the lake to getting through rough waters, these advanced outboard motors provide superior power, performance, and durability. Boasting modern designs in both two-stroke and four-stroke models, along with various power ratings, Mercury Outboard Motors provide peace of mind and plenty of get up and go for a safe and comfortable ride. Thanks to exclusive features such as optimized fuel economy, improved throttle response and integrated Digital Throttle & Shift functionality, you can enjoy smooth, effortless acceleration and precise control. Durable construction, backed by a 3 year limited non-declining warranty, ensures that Mercury Outboard Motors deliver reliable power and performance every time you hit the water.

3. Suzuki Outboards

While not quite as reliable, Suzuki Outboard Motors offer a great range of performance and power for recreational and commercial boaters alike. Combining innovative engineering with proven design technology, these outboard motors provide superior torque, smooth acceleration and steady performance, with reliable fuel economy across a range of four-stroke models. Thanks to advanced systems and innovative features, the driving experience with a Suzuki Outboard is second to none, allowing for greater control and precision on the water. Each motor is backed by a 3-year limited warranty and designed for maximum durability, making Suzuki Outboard Motors the perfect choice for a reliable, powerful and enjoyable journey.

4. Evinrude + Johnson Outboards

Evinrude Outboard Motors make the perfect addition to any boating excursion. With models available in two stroke configurations, these reliable outboard motors provide a range of power and torque to get you to your destination with ease. Evinrude’s advanced designs optimize performance, maximizing fuel economy and performance so you can enjoy a smooth and efficient ride. Thanks to features such as the E-TEC Direct Injection Technology, Evinrude engines provide improved throttle response and optimal fuel burn for a smooth, reliable ride, while their advanced cooling systems reduce the risk of overheating, ensuring peak performance and total control. Backed by a 3-year limited warranty, Evinrude Outboard Motors are the perfect choice for all types of boating adventure.

5. Honda, Tohatsu, Force, and Mariner Outboard Motors

Coming in 5th is a four way tie between the Honda, Tohatsu, Force, and Mariner brands. Why are these ranked so low? Simple – many technicians refuse to work on these due to limited parts availability, lack of training and limited experience. Sure – these can be a good deal – but unless you plan on repairing yourself we suggest you look elsewhere.

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WenDissy 4 Stroke Outboard Motor Boat Engine, Marine Boat Motor with Air Cooling System and Manual Pull Start for Inflatable Fishing Boats Yachts Water Sport Tools

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4 Stroke Outboard Motor Boat Engine, Marine Boat Motor with Air Cooling System and Manual Pull Start for Inflatable Fishing Boats Yachts Water Sport Tools

Purchase options and add-ons

Brand WenDissy
Item Weight 24.5 Pounds
Color Black
Material Aluminum Alloy, Rubber
Engine Displacement 55 Cubic Centimeters

About this item

  • Fast & Powerful: A 4-stroke engine with a maximum output of 2.9kW and 4hp, and a maximum speed of 5500rpm, provides you with unparalleled speed. The streamlined design of a 6.3'' three-blade propeller can reduce water resistance and provide stronger power during operation.
  • Selected Material: Lightweight and sturdy aluminum alloy, combined with spray painting technology, provides excellent corrosion resistance, wear resistance, heat resistance, shock resistance, deformation resistance, and other properties. You can use it with confidence in fresh water and salt water.
  • Easy to Operate: The throttle lever directly controls acceleration and steering. The step-less speed regulation allows you to easily adjust the running speed, combined with the clutch, bringing you a more comfortable and convenient user experience.
  • Lightweight & Fuel-efficient: As an outboard motor, it is relatively small(37*11.81*10.23in) and lightweight(24.5lbs), making it very suitable for small ships and people who frequently navigate short distances. An efficient carburetor burns fuel more fully, with a fuel consumption rate of 0.3 gal/h not only saving fuel but also reducing expenses.
  • Safe & Reassuring: The reliable CDI ignition system can quickly and safely start the motor, and suspension tilt adjustment pins and anti-vortex plates reduce inclination and vortices, ensuring smooth operation. The efficient heat dissipation holes coupled with overheating protection, allow you to continuously enjoy the fun of the navigation.

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WenDissy 4 Stroke Outboard Motor Boat Engine, Marine Boat Motor with Air Cooling System and Manual Pull Start for Inflatable

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Product description.

4 Stroke 4HP Outboard Boat Motors

A 4-stroke engine with a maximum output of 2.9kW and 4hp, and a maximum speed of 5500rpm, provides you with unparalleled speed. The streamlined design of a 6.3'' three-blade propeller can reduce water resistance and provide stronger power during operation.

Lightweight and sturdy aluminum alloy, combined with spray painting technology, provides excellent corrosion resistance, wear resistance, heat resistance, shock resistance, deformation resistance, and other properties.

The throttle lever directly controls acceleration and steering. The step-less speed regulation allows you to easily adjust the running speed, combined with the clutch, bringing you a more comfortable and convenient user experience.

As an outboard motor, it is relatively small(37*11.81*10.23in) and lightweight(24.5lbs), making it very suitable for small ships and people who frequently navigate short distances. An efficient carburetor burns fuel more fully, with a fuel consumption rate of 0.3 gal/h not only saving fuel but also reducing expenses.

The reliable CDI ignition system can quickly and safely start the motor, and suspension tilt adjustment pins and anti-vortex plates reduce inclination and vortices, ensuring smooth operation.

In addition to the outboard motor, our package also includes a funnel, a tool kit, etc., which can meet your usage needs at once.

4 Stroke 4HP Outboard Boat Motors

Application

It is suitable for rubber boats, inflatable boats, fishing boats, sailboats, yachts, canoes, kayaks, rubber boats, aluminum alloy boats, etc. with a stern height of 17.32 inches or less , assisting aquaculture, water transportation, net fishing, luring, outboard backup, outings, and river cleaning/maintenance.

Tail Plate Clamping Bolt: It can firmly fix the outboard motor on your ship and is not easy to slide.

Flameout Button: It allows you to immediately stop the machine running and avoid danger in case of an emergency.

Rubber Handle: The handle wrapped in rubber provides a more comfortable and secure grip, enhancing the sense of use.

4 Stroke 4HP Outboard Boat Motors

1.Please carefully read the manual and strictly follow the precautions to have a better experience.

2.Please measure the height of your boat before purchasing to ensure suitability for this product.

3.Please start the motor in the water.

4.Please note that this product should use 92 # unleaded gasoline or above, and an appropriate amount of 4-stroke engine oil needs to be added through a dedicated oil filling hole for lubrication.

5.Please do not drive too fast during the running-in period. After the running-in period, the gear oil needs to be replaced, and the second replacement time is about 100 hours or 6 months later.

6.After cruising in seawater or turbid water, please clean the outboard motor with fresh water. The engine should be stored in a dry and well-ventilated place, and avoid direct exposure to sunlight.

Material Aluminum Alloy, Rubber
Color Black
Surface Treatment Spray Paint
Engine 4-stroke 4hp
Displacement 55cc
Gear Ratio 2.08(27:13)
Number of Cylinders 1
Max. Output 2.9KW
Max. Speed 4500-5500r/Min
Gear Positions Clutch
Ignition System CDI
Cooling System Air-cooling
Control System Tiller Control
Starting System Manual Start
Fuel No.92 Lead-free Gasoline or Above
Engine Oil Type 4-stroke Engine Oil
Trim And Tilt System Manual Tilt
Fuel Tank Capacity 1.4L/0.37gal
Fuel Consumption Rate 1.1L/0.3gal/h
Propeller Diameter 16cm/6.3in
Joystick Length 40cm/15.74in
Handle Length 13cm/5.11in
Fixed Screw Spacing 12cm/4.7in
Adaptive Transom Plate Height: ≤44cm/17.32in
Net Weight 11.1kg/24.5lbs
Product Size 94*30*26cm/37*11.81*10.23in

Product information

Technical details.

Brand ‎WenDissy
Item Weight ‎24.5 Pounds
Color ‎Black
Material ‎Aluminum Alloy, Rubber
Engine Displacement ‎55 Cubic Centimeters
Engine Type ‎4 Stroke
Operation Mode ‎Electric, Manual
Recommended Uses For Product ‎For Inflatable Boats, For Fishing Boats
Mounting Type ‎Engine Mount
Fuel Type ‎No.92 Lead-free Gasoline or Above
Maximum Horsepower ‎4 Horsepower
Fuel Capacity ‎0.37 Gallons
Product Dimensions ‎11.81"D x 37"W x 10.23"H
Manufacturer ‎WenDissy
Model ‎4 stroke 4 hp
Item Weight ‎24.5 pounds
Country of Origin ‎China
Item model number ‎4 stroke 4 hp
Exterior ‎Machined
Manufacturer Part Number ‎outboard boat motors

Additional Information

ASIN B0CCY6PDC5
Customer Reviews
5.0 out of 5 stars
Best Sellers Rank #1,200,392 in Sports & Outdoors ( )
#2,239 in
Date First Available July 27, 2023

Warranty & Support

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10 Of The Most Powerful Yamaha Outboard Boat Motors Ever Made

Yamaha F350 on boat

Japanese manufacturer Yamaha has entered a wide range of different segments over the decades. Some have yielded better results than others -– its long-running lineup of motorcycles is well regarded for its reliability , but other projects such as its F1-inspired supercar failed to ever make it to production. One of its most famous success stories is its range of marine engines, which the brand has been producing in various forms since the '60s.

Its lineup stretches from modest engines that make only a few horsepower all the way up to V8 monsters that push more than 400 horsepower. The latter end of the spectrum has been subject to significant expansion in recent years, with Yamaha now offering boat owners looking for high-end engines a wider choice than ever. That means many of its most powerful marine engines to date are offered in its current lineup, although there are a few classics that also still remain high up the rankings. 

SlashGear has rounded up a selection of ten top performers from past and present, many of which offer improved efficiency and convenience as well as impressive levels of power.

Yamaha F200 – 200 horsepower

Yamaha F200 marine engine

Yamaha currently offers a range of 2.8L inline-4 engines, with its most powerful being the F200. It's designed with both versatility and efficiency in mind, being compatible with both digital and mechanical controls and running on 89 octane fuel. Yamaha has offered a 200 horsepower engine for many years now, but the latest iteration boasts an improved engine design with variable camshaft timing to reduce fuel consumption without reducing performance.

There is a long list of factors to consider when shopping for a marine engine, and running cost is one of the most important factors. The engine's reduced fuel usage combined with Yamaha's reputation for overall reliability means the engine scores well here. Another plus point is the F200's convenience for existing Yamaha marine engine owners -– the brand kept the mount points for the latest engine the same as older models, making it easier to fit as an upgrade.

Yamaha F225 – 225 horsepower

Yamaha F225 marine engine

The next step up in power in Yamaha's current lineup adds an extra pair of cylinders and an additional 25 horsepower. The F225 is a 4.2L V6 engine and is the least powerful variant in the brand's V6-powered range as of this writing. Alongside running costs as previously mentioned, another important factor to consider when looking for a marine engine is reliability. It's not an exact science –- look hard enough and you'll almost always be able to find a horror story online about any given engine –- but some engines are generally considered to be safer bets than others.

The F225 should be a safer bet, and with the ability to run on 89 octane fuel, it should be an economical one too. However, unlike the brand's F200 four-cylinder, the F225 isn't compatible with digital controls. In contrast, both of the more powerful engines in the current V6 range, the F250 and F300, are operable with both digital and mechanical controls.

Yamaha F250 – 250 horsepower

Yamaha F250 marine engine

Positioned as something of the middle child in Yamaha's current lineup of V6 engines, the F250 offers extra power and extra versatility over the F225. Most of the engine's internals remain the same, including the multi-point fuel injection system and variable camshaft timing that's shared with other, less potent Yamaha engines featured earlier on this list. The F250 is also Yamaha's lowest powered variant in the V6 range to offer digital steering compatibility.

Exactly how the added power translates into real-world performance will vary between boats, but to squeeze maximum speed out of the engine, Yamaha recommends pairing it with a Saltwater Series II HP propeller. In certain situations, the brand claims the propeller can increase top speed by up to two mph. Boat owners looking for further performance upgrades will need to look even further up the brand's engine lineup, although that comes at a significant added cost.

Yamaha Z300 – 300 horsepower

Yamaha Z300 marine engine

While Yamaha's current engines might be more efficient than the brand's older models, they're not necessarily more powerful. The Z300 is a prime example of that. It was launched in 2003 and remains one of the brand's most powerful engines to date. The 3.3L two-stroke V6 engine was designed to be the most efficient engine of its kind at its launch, being the first 300 horsepower engine in the industry designed to meet the EPA's upcoming at the time 2006 emissions standards.

Those improvements in efficiency were partly down to the brand's High Pressure Direct Injection technology, with the Z300 being the most powerful Yamaha engine to feature the system. Another uncommon feature was the Yamaha Diagnostic System, which allowed for computer-based diagnostics to be carried out. It performed the same kind of role as the OBD-II system that had been required on cars since the '90s, but at the time of the Z300's launch, it was still unusual to see the technology available for a marine engine.

Yamaha F300 – 300 horsepower

Yamaha F300 marine engine

The most powerful engine in Yamaha's current 4.2L V6 engine lineup is the F300, which follows the brand's handy naming conventions and churns out 300 horsepower. It offers the same benefits as less powerful variants, boasting impressive efficiency and extra features compared to older models. It's also highly reliable according to Yamaha's warranty data, with 96% of all engines remaining in service throughout their whole warranty period without a claim.

Not only should it be reliable over the long run, it should also stay looking modern too thanks to its redesigned cowling. Styling is far from the most important factor to consider when looking for a marine engine, but most boat owners will at least want an engine that doesn't detract from the styling of their boat. The F300 looks good across a range of applications, and thanks to the prominent 300 badging, its status as a high-end V6 engine is clear for all to see.

Yamaha Offshore F350 – 350 horsepower

Yamaha Offshore F350 marine engine

While the F300 is one of the most powerful V6 marine engines that Yamaha offers, as of the beginning of 2024, it's no longer the most powerful of all. That honor instead goes to the F350, which features a larger 4.3L displacement to help churn out its superior power. It also borrows design elements from the brand's V8 engines, including the valve lifter, throttle valve, and camshaft. The added power necessitates an improved cooling system, and as a result the F350 also boasts a heavier duty cooling fan than lesser V6 variants.

The extra horses don't result in a significant weight gain, however, as the F350 weighs 629 pounds. Few, if any, other engines in the segment deliver that kind of power to weight ratio. In styling terms, the F350 is similar to the less powerful V6 engines found elsewhere in Yamaha's range, but the 350 badging on the cowling ensures that none of your fellow boat enthusiasts will confuse the F350 for anything less than a range-topper.

Yamaha XTO F375 – 375 horsepower

Yamaha XTO F375 marine engine

The 375 horsepower engine is still a new addition to the Yamaha lineup, with the brand only offering it for the first time in 2018. It's since been joined by a trio of even more powerful Yamaha engines, making it the entry level option for buyers to the V8 range. Entry level is a relative term here, however. The XTO F375 is still an impressive piece of kit, being the first engine of its kind to feature built-in electronic steering and the first Yamaha four-stroke engine with direct injection.

For the majority of boat owners, an engine like this will be overkill. It's designed squarely at owners with large boats who can justify a higher initial outlay in return for added performance and the dependability that Yamaha is known for. It makes use of the latest and greatest innovations that the brand has to offer, both in terms of design and in terms of the material used in its construction.

Yamaha XTO F400 – 400 horsepower

Yamaha XTO F400 marine engine

Launched in 2023, the XTO F400 is one of the latest additions to Yamaha's range. It's the next step up in the 5.6L V8 range, above the F375, and shares most of its design with its stablemate. That design was created to be a step above the Japanese manufacturer's previous offerings, with heavy-duty components used wherever possible and careful consideration given to long-term serviceability.

This extends to elements like the cowling design, which was reworked from previous Yamaha models to make it easier to perform oil changes while in dock. Other revised systems include the new exhaust design, which reroutes emissions through a trio of exits that are automatically adjusted based on the engine's rpm. That allows for significantly higher levels of reverse thrust than were previously possible, without additional fuel consumption. The direct-injection system, another unique feature to Yamaha, also helps keep fuel consumption down without compromising on power.

Yamaha XTO F425 – 425 horsepower

Yamaha XTO F425 marine engine

The penultimate offering in Yamaha's flagship V8 range is the F425. It requires only 89 octane fuel to reach its maximum 425 horsepower output, much like the other variants in the range. It also boasts the same electric steering system, which is worth delving deeper into. The system is unique to Yamaha and the brand claims that it's the first of its kind, being more efficient and also more responsive than its rivals.

The key difference is that the system uses an electric motor to move the engine rather than relying on an electric pump driving a hydraulic system. Cutting out the hydraulics cuts down on maintenance, as well as reducing the complexity of the system, which should in turn increase reliability. It also boosts reaction time, making it a clear upgrade over a traditional hydraulic-based system.

All of this means that not only is the F425 exceptionally powerful, it's also exceptionally maneuverable thanks to the upgraded steering.

Yamaha XTO F450 – 450 horsepower

Yamaha XTO F450 marine engine

The most powerful Yamaha marine engine made to date is the XTO F450, which was unveiled in 2023. It's the most powerful iteration of Yamaha's 5.6L V8 range, with a revised exhaust system helping to hit this new power benchmark. Other systems, including its direct injection system and electric steering, are shared with the less potent variants of the V8 range. The 450 horsepower engine allows larger boats than ever before to make use of Yamaha's outboard range, and also adds a high-output option for existing users looking to upgrade for maximum performance.

For now, it is the pinnacle of Yamaha's engine range, and there's no indication that it won't stay that way for the foreseeable future. The usefulness –- and therefore business case -– for significantly more powerful outboard motors is questionable, although rival brand Mercury already offers an engine with as much as 600 horsepower. Whether Yamaha eventually steps into that power bracket remains to be seen, but for now, the XTO F450 remains more than powerful enough for even the most demanding boat owners.

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Toyota recall aims to replace every engine in 100,000 Tundra pickups and Lexus SUVs

2023 Toyota Tundra SR5 SX package 2

There are safety recalls, and then there are really time-consuming, expensive safety recalls. Toyota is experiencing the latter, having discovered earlier this year a defect in its twin-turbocharged V-6 truck engines that power the Tundra pickup truck as well as Lexus's LX luxury SUVs — at least, those 2022 to 2023 model-year variants built between November 2021 and February 2023 (or the same model years built between July 2021 and November 2022 for the LX). The issue can cause the engine stall unexpectedly; per Toyota's NHTSA recall notices to dealers:

"There is a possibility that certain machining debris may not have been cleared from the engine when it was produced. In the involved vehicles, this can lead to potential engine knocking, engine rough running, engine no start and/or a loss of motive power. A loss of motive power while driving at higher speeds can increase the risk of a crash."

When Toyota submitted documentation of the issue to NHTSA (National Highway Traffic Safety Administration) in May 2024, it noted that a fix for the 102,092 potentially affected vehicles was still being determined. At the time, Toyota also estimated that 1 percent of those vehicles might actually suffer from the defect, but that was due to a quirk in NHTSA's filing requirements. As the company notes in the filing, it only estimated a 1-percent failure rate because it in fact was "unable to estimate the percentage of the involved vehicles to actually contain the defect described in Section 5. However, as the NHTSA manufacturer portal requires an integer value be entered, Toyota has entered the value “1” in response to this question in the portal. For the purpose of this report, '1' means 'unknown'."

Fuel economy in 2024: See the most fuel-efficient new pickup trucks on the market

Two months later, it seems Toyota arrived no closer to a solid estimate of how many Tundras and LX models are potentially impacted by the machining debris issue, so it's decided to remedy the problem by replacing every potentially affected engine, per reporting by Automotive News . (We've reached out to Toyota for confirmation that this is, in fact, the fix, and will update this piece when we hear back.) Toyota notes that this remedy applies only (at least so far) to the non-hybrid versions of its V35A twin-turbocharged 3.4-liter V-6 engines; the hybrid variants (available in the Tundra) can still provide motive power in the event of an engine failure, thanks to their electric motors.

The company began investigating the issue back in March 2022, following a report of a customer vehicle stalling; it determined the main bearings had seized. More similar reports began flowing in, and Toyota kept working to determine the cause through 2023 (and yet more reports of damaged engines), eventually determining errant machining debris was the cause (after noting issues with even "good" engines Toyota had "recovered from the field") and initiating a voluntary recall campaign following a total of 166 Toyota Field Technical Reports highlighting the issue and 824 warranty claims on engines.

2024 pickup trucks: These are the best small and midsize picks to buy

Yanking the engines from over 100,000 vehicles (an estimated 98,600 Tundras and 3,500 LX SUVs), and then replacing those engines, will be eye-wateringly expensive for Toyota, both as measured in the pure cost of the replacement engines, the labor involved and production of new engines for new trucks and SUVs potentially lost to spinning up enough replacement engines to cover the recall. But good on Toyota for arriving at a safe, thorough remedy to a problem that could impact only a handful of vehicles or possibly many, many more. Notices to owners are being sent out before the end of this month.

Photos by MotorTrend

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Car recalls are never fun but now Ford has a new one on its hands over the risk of engine fires. This comes after the airbag recall.

Ford to recall 85,000 vehicles over risk of engine fires

Car recalls aren’t fun for owners or automakers. However, they are an unavoidable aspect of owning a vehicle from recent years. Of course, Ford recently issued an airbag recall, but now the Blue Oval has another one on its hands. This time, the recall concerns the risk that some of the automaker’s engines could catch fire. In particular, it impacts the Ford Explorer SUV.

Ford is no stranger to car recalls

There have been several car recalls this year alone, and Ford has been at the center of quite a few. According to Reuters , the automaker has plans to fix about 85,000 Ford Explorer SUVs that have the Police Interceptor Utility package added to them. This car recall is happening because there is a risk that the engines in these vehicles could catch fire. 

The report states that if the engine fails in these Ford Explorer SUVs, oil and fuel could get into the engine compartment. If these substances get too close to the hot engine or various parts of the exhaust system, an engine compartment fire could occur. Unlike many car recalls, only one vehicle is impacted. It specifically addresses the Ford Explorer SUVs with the Police Interceptor Utility package from 2020-2022 that use the 3.3-liter engine. 

The Ford Police Interceptor Utility package has been around since 2013, and law enforcement agencies all over the country use it. The Ford Explorer SUV with this package is the bestselling police vehicle in the U.S. Notably, Ford just announced the 2025 version of the SUV.

For more reading on car recalls, check out our article on the Ford airbag recall.

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Barnell Anderson

Barnell Anderson joined the MotorBiscuit team in 2023. After earning a Master of Arts in English from Louisiana Tech University, Barnell found his way into automotive journalism. He’s been writing about the automotive industry since 2021, creating vehicle comparisons and discussing reliability and vehicle safety ratings for various outlets, including HotCars and SlashGear.

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Ford recalls about 85,000 Explorer SUVs over engine fire risk

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Ford recalls 85K Explorer Police Interceptor SUVs because of possible engine fires

  • Published: Aug. 16, 2024, 12:06 p.m.

motorboat engine

The Ford Motor Company World Headquarters logo pictured in Dearborn, Michigan on March 30, 2020. (Jeremy Marble | MLive.com) Jeremy Marble | MLive.com

DETROIT -- A problem that can cause engine fires has led Ford to recall an estimated 85,000 of its Explorer Police Interceptor Utility vehicles, according to the Associated Press. The recall impacts the SUVs with model years 2020 to 2022 and have 3.3L hybrid or gas engines.

So far, Ford has received 13 complaints regarding under hood fires in North America that involve engine block breaches on the SUVs in question. Ford says the fires all happened on models built with 3.3L engines made before June 2, 2022 and that the issue does not impact non-police vehicles.

No injuries or accidents related to the problem have been reported to Ford, according to documents posted by the National Highway Traffic Safety Administration.

The issue stems from possible engine failures that can lead to significant quantities of engine oil or fuel vapor possibly being released under the hood. If that happens, the oil or vapor can migrate to and accumulate near ignition sources which increases the risk of a fire.

While a fix for the problem has not yet been developed, Ford plans to mail a letter to impacted vehicle owners advising them that the investigation is ongoing. Ford will also reach out to owners when more information is available. Parts and a software update are expected to be ready in the second quarter of next year.

Until a fix can be developed, Ford is asking owners of impacted models to safely park and shut off the engine as soon as possible if they hear any unexpected engine noises. Owners should also stop driving the vehicle if they experience any unexpected torque reduction, or if smoke is seen coming from the engine compartment.

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    4-stroke 6 HP Outboard Motor Boat Engine,170cc Heavy Duty Boat Engine w/Air Cooling System, Single Cylinder Fishing Boats Engine, Outboard Motor for Inflatable Boats, Canoes, Sailboats, Yachts. 7. $32299. Typical: $342.99. Save 5% with coupon.

  13. Marine Power USA

    Industry leading inboard marine engine manufacturer. With over 60 years of marine engine innovation and design experience. Whether you are in need of a replacement engine or just looking to add more power to your boat, Marine Power has got you covered with their line of longblock, partial, and complete engine packages.

  14. Outboard Motors & Engines, Parts and Accessories

    Find the engine your boat deserves with Evinrude's unparalleled line of outboard motors, parts, and accessories, available at dealers nationwide.

  15. Outboard Motors, Boat Parts, Marine Engines, Inboard Boat Motor

    Find thousands of discount boat parts for your boat & boat motor including parts for outboard motors, inboard motors & sterndrives. For more boat repair & maintenance, also find a huge selection of marine supplies, boat motor manuals & repair books, a discussion forum & marine engine classified ads.

  16. Outboard Motors and Boat Engines

    Find Outboard Motors and Engines for your boat today on Boat Trader! Shop 2624 for sale from leading brands inc. Yamaha, Mercury, Tohatsu, Honda.

  17. SeaPro™ 500hp Outboard Motor

    Mercury redefined the way horsepower meets the water by building the first-ever V12 outboard. At 500hp, it's our most powerful, most capable commercial outboard yet. Heavy-duty components provide rugged reliability, while a revolutionary steerable gearcase and automatic two-speed transmission deliver unrivaled handling and maneuverability.

  18. Marine Engine Depot. Complete Marine Engines

    Your one and only source for authentic complete Marine Power engines. Built using Authentic GM Base Engines. Marine engines built for any application including inboard, jet boat, air boat, sterndrive, and more. Find your drop-in replacement engine today.

  19. Top 5 Outboard Motor Brands Ranked

    2. Mercury Outboards With a variety of different options, Mercury Outboard Motors are the best choice for any type of boating experience, offering high-performance engines and innovative designs to make your next journey a memorable one. From leisurely days on the lake to getting through rough waters, these advanced outboard motors provide superior power, performance, and durability. Boasting ...

  20. WenDissy 4 Stroke 4HP Outboard Boat Motors, 52CC Electric Outboard

    Buy WenDissy 4 Stroke 4HP Outboard Boat Motors, 52CC Electric Outboard Engine with Air Cooling and CDI Ignition System, Outboard Trolling Engine For Heavy Duty Fishing Boats, Inflatable Boat, Gas Boat: Outboard Motors - Amazon.com FREE DELIVERY possible on eligible purchases

  21. Motorboat

    motorboat, a relatively small watercraft propelled by an internal-combustion or electric engine. Motorboats range in size from miniature craft designed to carry one person to seagoing vessels of 100 feet (30 m) or more. Most motorboats, however, have space for six passengers or fewer. Motorboats are used recreationally for traveling on water ...

  22. 10 Of The Most Powerful Yamaha Outboard Boat Motors Ever Made

    If you are searching for a dependable and competitively priced outboard motor, Yamaha has a diverse selection available. Here are the most powerful available.

  23. Toyota recall aims to replace every engine in 100,000 Tundra pickups

    The sheer number of engines being replaced is going to make this a very, very expensive manufacturing defect.

  24. Ford to recall 85,000 vehicles over risk of engine fires

    The report states that if the engine fails in these Ford Explorer SUVs, oil and fuel could get into the engine compartment. If these substances get too close to the hot engine or various parts of the exhaust system, an engine compartment fire could occur. Unlike many car recalls, only one vehicle is impacted.

  25. Ford recalls about 85,000 Explorer SUVs over engine fire risk

    Ford Motor is recalling about 85,000 Explorer SUVs equipped with the Police Interceptor Utility package over concerns of an engine fire, the National Highway Traffic Safety Administration said on ...

  26. New York State Vehicle Safety/Emissions Inspection Program

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  27. Marine Propulsion: Outboards Vs Inboards And Everything In Between

    Marine engines and power systems can be quite complex and varied. Here we demystify them and explain the basics behind what powers your boat to help you better understand all the types of motorboat engines out there on the water.

  28. 2025 Lamborghini Temerario: This Is It

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  29. Ford recalls 85K Explorer Police Interceptor SUVs because of ...

    DETROIT -- A problem that can cause engine fires has led Ford to recall an estimated 85,000 of its Explorer Police Interceptor Utility vehicles, according to the Associated Press.