Complete Outboard Engines

A good outboard motor is a wonderful asset to have, whether you have a large fishing boat or a small runabout skiff. A reliable motor is a great way to ensure a fun, safe time on the water. The actual motor or pair of outboard motors that you need will vary based on their purpose and the size of your vessel.

What are the main fuel systems for an outboard motor?
  • In direct fuel injection, a precise amount of gasoline is injected at high pressure directly into the combustion chamber. This results in complete combustion and great power.
  • With electronic fuel injection, vaporized fuel is introduced into the air intake for each cylinder. The fuel cools the hot valve and increases the amount of fuel vapor in the chamber. This increases power, decreases pollution, and eliminates the need for priming.
  • With carburetor fuel induction, many four-stroke outboards meet all emission standards and offer excellent fuel economy.
What are the different kinds of two-strokes?

Originally, two-stroke motors required a special oil to be mixed with the gas before being added to the tank. This oil-gas premix lubricated the motor as it was being burned. Later, two-strokes used direct fuel injection, with the oil being kept in a separate tank. This makes the outboard not only more efficient but easier on the environment.

How much power should you look for?

Its a good idea to look within the range of horsepower your vessel is rated for. Factor in the boat, passengers, fuel tank, ice chest, and supplies. Within the range that your boat is rated, a higher horsepower number will give you a bit more power if you want to go fast, while a number at the lower end can save you a bit of fuel on long, slow trips.

What outboard motors are suitable for smaller, lighter boats?

A two-stroke, also known as a two-cycle motor, draws a fuel-air mixture into the combustion chamber through an opening in the side of the cylinder, then purges the exhaust through a second opening in the cylinder. It employs one stroke for the compression and another for combustion.

Two-strokes deliver fast acceleration because there are twice as many strokes per power cycle. Their light weight makes them ideal for smaller, lighter boats.

What outboard motors are suitable for larger, heavier boats?

As a general rule, four-stroke outboard uses a separate stroke for each step in the process: one to draw in a fuel-air mix, a second for compression, a third for ignition, and a final stroke for exhaust. This division of labor gives the four-stroke motor great power.

Four-stroke outboards function like automotive engines and use computer systems to enhance performance, offer outstanding fuel economy, and generate more torque, making them suited for larger, heavier vessels. While this technology is mainly found in four-strokes, some companies like Evinrude offer the same technology in a two-stroke model of equal power.