Their light weight makes them ideal for smaller, lighter boats. Two-strokes deliver fast acceleration because there are twice as many strokes per power cycle. It employs one stroke for the compression and another for combustion. What outboard motors are suitable for smaller, lighter boats?Ī 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. 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. Factor in the boat, passengers, fuel tank, ice chest, and supplies. Its a good idea to look within the range of horsepower your vessel is rated for. This makes the outboard not only more efficient but easier on the environment. Later, two-strokes used direct fuel injection, with the oil being kept in a separate tank.
This oil-gas premix lubricated the motor as it was being burned. Originally, two-stroke motors required a special oil to be mixed with the gas before being added to the tank. What are the different kinds of two-strokes? With carburetor fuel induction, many four-stroke outboards meet all emission standards and offer excellent fuel economy.This increases power, decreases pollution, and eliminates the need for priming. The fuel cools the hot valve and increases the amount of fuel vapor in the chamber. With electronic fuel injection, vaporized fuel is introduced into the air intake for each cylinder.This results in complete combustion and great power. In direct fuel injection, a precise amount of gasoline is injected at high pressure directly into the combustion chamber.What are the main fuel systems for an outboard motor? The actual motor or pair of outboard motors that you need will vary based on their purpose and the size of your vessel. A reliable motor is a great way to ensure a fun, safe time on the water. A good outboard motor is a wonderful asset to have, whether you have a large fishing boat or a small runabout skiff.