Choosing An Outboard Engine
Outboard engines fall into two most important categories; 2 stroke and 4 stroke outboards. Each types have their advantages and disadvantages and the type you pick will rely upon the intended use. This guide will allow you to choose which outboard engine is best for your type of boat.
2 Stroke Outboards
2 stroke engines are lighter and faster so when speed and acceleration are required, this could be the engine of choice. They're also more affordable and have a higher resale value. As 2 stroke engines have been around for almost eighty years, parts are readily available, making repairs easy. Additionally, the design on these engines is less complicated than a four stroke, that means problems are less likely to arise.
There are some disadvantages to the two stroke engine. 2 stroke engines are more pollute than four stroke engines so they are not so kind on the environment. Their engines are lubricated by the oil that's blended into the gasoline, meaning the exhaust is smoky and comprises unburned oil, which in turn pollutes the water.
With new rules, outboard manufacturers are looking to seek out new ways of producing the identical power with less pollution.
4 Stroke Outboards
four stroke engines are quieter, smoother and more economical. Heavier with slower acceleration, they are usually chosen for lakes and rivers. With less air pollution and smoke they're also kinder to the environment. If you happen to’re after a quieter, smoother ride, then the 4 stroke outboard is the better choice.
four stroke motors have more complex engines which may lead to more repairs. When a repair is required it is usually more costly and parts are limited.
four stroke outboards are generally heavier than 2 stroke outboards, so for those who own a smaller boat it is probably not able to hold the weight of a four stroke engine.
Because four stroke engines are newer, they are continually being improved to make purchase and repair easier.
Some four stroke outboard engine manufacturers embrace Yamaha, Tohatsu, Suzuki, Nissan, Mercury, Honda and Johnson outboard after market parts.
Environmentally Pleasant Outboards
For those who’re looking for a new outboard, it’s worthwhile considering one of the newer, environmentally pleasant models. Much less air pollution, reduced noise, higher fuel economic system and decrease running prices are amongst the advantages.
The Mechanical Variations Between 2 and 4 Stroke Outboards
The terms "2 stroke" and "4 stroke" check with the number of times the piston moves during one firing cycle of the engine. In the four stroke engine, the 4 movements, or strokes, are:
Intake stroke: With the intake valve open, the piston moves down allowing a combination of air and fuel to enter the combustion chamber.
Compression stroke: The piston moves up the cylinder with the valves closed, so that the air-fuel mixture is compressed.
Combustion stroke: With the valves still closed, the fuel is ignited by the spark plug. The explosion pushes the piston down again.
Exhaust stroke: The exhaust valve opens and the piston moves as much as push the exhaust gasses out of the chamber so the process may be repeated.
In a 2 stroke engine, there are only two movements of the piston for every combustion; one up and one down:
Combustion stroke: Combustion of fuel drives the piston downwards. Because the piston moves down, it exposes an exhaust vent and fuel inlet within the wall of the cylinder permitting exhaust gasses out, and new air and fuel to be sucked in.
Compression stroke: Because the piston moves back up, it blocks off the exhaust vent and fuel inlet and thus compresses the air/fuel mixture. The spark plug ignites the air and fuel inflicting the piston to move down again.
The fuel inlet and the exhaust vent in the wall of the cylinder eradicate the necessity for valves and the mechanism for opening and shutting them which is why 2 stroke engines are much easier in design.
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2 Stroke Outboards
2 stroke engines are lighter and faster so when speed and acceleration are required, this could be the engine of choice. They're also more affordable and have a higher resale value. As 2 stroke engines have been around for almost eighty years, parts are readily available, making repairs easy. Additionally, the design on these engines is less complicated than a four stroke, that means problems are less likely to arise.
There are some disadvantages to the two stroke engine. 2 stroke engines are more pollute than four stroke engines so they are not so kind on the environment. Their engines are lubricated by the oil that's blended into the gasoline, meaning the exhaust is smoky and comprises unburned oil, which in turn pollutes the water.
With new rules, outboard manufacturers are looking to seek out new ways of producing the identical power with less pollution.
4 Stroke Outboards
four stroke engines are quieter, smoother and more economical. Heavier with slower acceleration, they are usually chosen for lakes and rivers. With less air pollution and smoke they're also kinder to the environment. If you happen to’re after a quieter, smoother ride, then the 4 stroke outboard is the better choice.
four stroke motors have more complex engines which may lead to more repairs. When a repair is required it is usually more costly and parts are limited.
four stroke outboards are generally heavier than 2 stroke outboards, so for those who own a smaller boat it is probably not able to hold the weight of a four stroke engine.
Because four stroke engines are newer, they are continually being improved to make purchase and repair easier.
Some four stroke outboard engine manufacturers embrace Yamaha, Tohatsu, Suzuki, Nissan, Mercury, Honda and Johnson outboard after market parts.
Environmentally Pleasant Outboards
For those who’re looking for a new outboard, it’s worthwhile considering one of the newer, environmentally pleasant models. Much less air pollution, reduced noise, higher fuel economic system and decrease running prices are amongst the advantages.
The Mechanical Variations Between 2 and 4 Stroke Outboards
The terms "2 stroke" and "4 stroke" check with the number of times the piston moves during one firing cycle of the engine. In the four stroke engine, the 4 movements, or strokes, are:
Intake stroke: With the intake valve open, the piston moves down allowing a combination of air and fuel to enter the combustion chamber.
Compression stroke: The piston moves up the cylinder with the valves closed, so that the air-fuel mixture is compressed.
Combustion stroke: With the valves still closed, the fuel is ignited by the spark plug. The explosion pushes the piston down again.
Exhaust stroke: The exhaust valve opens and the piston moves as much as push the exhaust gasses out of the chamber so the process may be repeated.
In a 2 stroke engine, there are only two movements of the piston for every combustion; one up and one down:
Combustion stroke: Combustion of fuel drives the piston downwards. Because the piston moves down, it exposes an exhaust vent and fuel inlet within the wall of the cylinder permitting exhaust gasses out, and new air and fuel to be sucked in.
Compression stroke: Because the piston moves back up, it blocks off the exhaust vent and fuel inlet and thus compresses the air/fuel mixture. The spark plug ignites the air and fuel inflicting the piston to move down again.
The fuel inlet and the exhaust vent in the wall of the cylinder eradicate the necessity for valves and the mechanism for opening and shutting them which is why 2 stroke engines are much easier in design.
If you loved this posting and you would like to acquire much more details pertaining to Tips for maintaining outboard motor kindly go to the web-page.
