Getting the Best Boat Engine for You

Are you suffering from a lack of horsepower?

Or maybe it’s time for an upgrade.

Whatever the case may be, when you’re looking to buy a boat engine, you have a variety of options — unlike when you buy a car.

There are several things to consider, including what brand, how much power, and gas versus diesel.

But the most important thing to keep in mind is: How will I be using my boat?

Outboard Motors

Did you know that boat motors are required to go through testing before they are sold to the public, including approval from the Coast Guard?

There are two types of boat engines: outboard and inboard.

Outboard engines can be found on the outside of the hull either on the stern or the back of the boat — hence, “out” board.

While you’re using your engine, the outboard motor is submerged in the water, but it can be taken out when the boat is idle. Because it can be moved, it isn’t exposed to the corrosion or other issues caused by both salt and freshwater.

An inboard engine is just what it sounds like: an engine in the boat, typically kept in the hull. Many times they have more power, and they aren’t exposed to the water, which speeds up corrosion.

However, an inboard engine tends to be more difficult to remove and replace. Plus, maintenance is more difficult on these engines.

Although both types of engines will suffice for water sports, the outboard motor usually wins overall.

You’re much more likely to find an outboard boat engine on your buddy’s fishing rig than an inboard motor.

Not only are they more reliable, but outboard motors are also easier to control, maintain and handle.

Choosing what type of motor you’re going to buy may be the most important step in the process. Now, let the options begin!

Boat Engine Manufacturers — or Buy Used

When you buy a new boat engine, you’re investing in a new heart for your boat.

Generally, it’s best to go with a new engine to make sure you have a warranty (think of it as health insurance).

You may be thinking of switching brands. And that’s OK — there are plenty of great manufacturers for you to choose from.

Whether you’re unsatisfied with the service, warranty or any other reason, go to your local dealer and test drive something new.

Let them know what your problems and issues with your old brand were. They’ll be able to give you suggestions and guide you into the right engine.

If you decide to go the used route, there are a few tips you can use to make sure you’re getting the most boat engine for your buck:

If possible, take it for a ride. See if you like how it performs.
Go full throttle. This will give you insight into how the engine will run and may give you a head’s up if there are any looming problems (though not always).
Ask for a service report. Find out what maintenance has been done to the engine.
Check the outside. Does it have a lot of wear? If you see any welding, ask questions.
Do a compression test. This checks the boat engine’s cylinders. Make sure there’s no more than a 10% difference.
Look for leaks. Take off the motor cover and look for any leaks. If you’re not sure what you’re looking for, hire a professional or take someone with you.

Two-stroke vs. Four-stroke

If you choose an outboard motor, you will eventually need to answer the question: two-stroke or four-stroke?

Many boaters believe in the power of the four-stroke, but that isn’t always so.

Although outboards used to be primarily two-stroke engines, environmental issues and gas prices have led the four-stroke revolution.

However, as technology continues to evolve, this isn’t necessarily the case.

First: What’s the difference between a two-stroke and a four-stroke boat engine?

Two-stroke: These engines burn a gas and oil blend, and a compression stroke is followed by an explosion stroke, which uses the previously compressed fuel. There are no valves with two-strokes; everything works with an in-and-out motion. These engines tend to be lighter. As a general rule, the hole shot with a two-stroke will be stronger — but the difference is shrinking.
Four-stroke: Think of your car. These engines use gas within cylinders and circulate oil through a different system. In a four-stroke, oil and gas don’t mix unless your engine is breaking down. These engines tend to be quieter, and there’s a different stroke for each task.

Also, two-strokes tend to be cheaper, although they need a special lubricant, Plus, they wear out much faster and require more maintenance than your standard four-stroke.

The best way to choose which engine is right for you is by looking at how you want your boat to perform and how to get the best value out of your motor in your situation.

Gas or Diesel

Next choice: Gas or diesel.

This option will be made based on the size of your boat and what type of engine you choose.

Diesel engines are reserved for heavier, more powerful boats. These tend to cost more and are more difficult to repair when they break down, but they do last longer. A diesel engine will normally cost less than a gas engine.

A gas-powered engine is a great option for a smaller boat or one that is used for everyday use. The key is to think about what your boat will be used for.

Environmental Considerations

Whether it’s the noise your engine creates or the pollution it gives off, it’s a good idea to check the local laws in your area when buying a boat engine.

Because they can emit a lot of noise, which can get you a noise ordinance fine if you aren’t careful. For instance, diesel engines are louder than gas engines, so you may want to keep that into consideration when making your purchase if you live in an area where noise pollution is an issue.

And when making the two-stroke or four-stroke choice, where you live may make or break your decision.

Some areas are stricter than others when it comes to environmental laws, so buying a used two-stroke known for causing pollution may cost you in the end as opposed to investing in a new four-stroke engine.

On the other hand, the newest models of two-strokes have seen a huge reduction in pollution, so it may be a viable option in your location.

Is Bigger Better?

You’ve heard the term “Go big or go home.”

It’s the same when it comes to your boat.

After all, why put a boat engine fit for a Jetski in a container ship?

So why not get as much power as you can into your boat.

Plus, just because you have the power doesn’t mean you always have to use it.

But have you ever heard someone say their boat engine is TOO big?

Plus, just because the power is there, doesn’t mean it’s always going to be in use.

To help you decide just how big to go, go to a dealer and take a trial run with a motor less than you think you will need. Then try a motor more than you think you’ll need.

This way, you can weigh the differences and plan from there.

Prop It Up

With every engine comes a propeller.

So it’s important to also choose the right propeller when picking out your perfect motor.

When looking for the right propeller, there are a few main things to consider:

Will it last the test of time? If your prop fails, it can end up destroying your boat engine. Make sure you invest enough in your prop to keep your engine running.
What are you using your boat for? Everything comes back to this question. Whether you’re using your boat for fishing, skiing or play, your engine and prop decision will come down to this.
Stainless or aluminum? Stainless is stronger. Aluminum is cheaper.

Regardless of which prop you choose, it’s always best to test it at wide-open. This way, you’ll always know the max load you can take your boat to.

Single or Twin?

You know you need a new engine, but the question remains: one or two?

Many boaters ask themselves this question for peace of mind. After all, if one engine fails, there’s a backup.

Also, twin engines can make it easier to dock your boat, because the props revolve in opposite directions.

So how do you know if you should have one engine or two?

If you have an old engine, you may want to install a new one for safety’s sake.

If your boat is going to be on towing duty, it may be smart to invest in two. Twin engines make tow jobs easier and act as a backup, so you have double the assurance with two engines as opposed to one.

Plus, you always have a reserve if anything goes wrong.

However, if the purpose of your boat engine is for family sports or simple tasks, a single engine will do everything you need it to do.

And don’t forget to factor in the price of gas. Naturally, with two engines you’ll need double the fuel. But again: What is the purpose of your boat?

If you’re going to be doing a lot of running, it may not matter in the end.

Get Moving

Many times, adding a new boat engine is like buying a completely new boat.

Knowing what you will be using your boat for as well as having a bit of know-how under your belt can get you a long way in the buying process as well as with your new engine.

The best place to start is with your local dealer, who will help you get on the water in the safest and quickest way possible.