Yamaha Engines Boats

Yamaha Engines Boats

What outboard – 2 stroke or 4 stroke?

outboard motors fall into two broad categories: 2-stroke engines and 4 outdoor accident stroke. Both types have their advantages and disadvantages and the type chosen will depend on the intended use. This guide will help you choose the engine in the board is best for your type of boat.

Two outboard motors diseases

2 two-stroke engines are lighter and faster so when speed and acceleration are required, which would be the engine of choice. 2 strokes are usually less expensive and keep your best value when it comes to remaining resale. As 2-stroke engines have been around for almost 80 years, parts are readily available, repairs facilitation. In addition, the design of these engines is less complex than 4-stroke, meaning problems are less likely to occur.

There are drawbacks for 2-stroke engine. 2-Stroke Engines 4 more polluting two-stroke engines, so they are not as environmentally friendly. Their engines are lubricated oil mixed with gasoline, ie exhaust is smoky and contains unburned oil, which in turn pollutes the water.

With the new regulations, engine manufacturers are seeking new ways to produce the same energy with less pollution.

Some manufacturers of outboard motor 2 stroke Mercury, Nissan, Yamaha and Evinrude.

4 outboards diseases

Four engines two times are quieter, more flexible and more economical. Heavier acceleration under, who are normally selected for lakes and rivers. With less pollution and smoke are also more environmentally friendly. If you are looking for a quieter, more smooth ride, then the outboard motor 4 stroke is the best choice.

Outboard 4 stroke are more complex with several parties therefore often need more frequent repairs. When the repair is necessary, it is generally more expensive and parts are limited.

outboards four stroke are generally heavier than outboard two stroke, so if you have a smaller boat may not be able to withstand the weight of a 4-stroke engine.

As as four two-stroke engines are newer, which are constantly improved to make it easier to buy and repair.

Some Manufacturers of outboard motor 4 stroke include Yamaha, Tohatsu, Suzuki, Nissan, Mercury, Honda and Johnson.

Outboard ecological

If you looking for a new outboard motor, it is useful to examine one of the most environmentally friendly models. Also produce fewer emissions, there are a number of other benefits such as fuel efficiency, quieter operation and lower operating costs.

The Mechanical Differences Between 2 and 4 outboards diseases

The words "twice" and "4 stroke" refer to the number of times the piston moves during a cooking cycle of the engine. In the 4-stroke engine, four movement or impact, are:

intake stroke: When the valve open admissions, the piston moves down to allow mixing of air and fuel entering the combustion chamber.

compression stroke: The piston moves the cylinder with the valves closed, so that the air-fuel mixture is compressed.

burning time: With valves still closed, the fuel is ignited by the candle. The explosion pushes the piston down again.

escape movement: exhaust valve opens and the piston moves upwards to push the exhaust of the camera so that the process can be repeated.

In a 2-stroke engine, that there are two movements of the piston for each combustion, one above and below:

burning time: Burning fuel units piston down. As the piston down, it has an output of air and fuel entering the wall of the cylinder and allow exhaust air and new fuel to be sucked in.

compression stroke: When the piston moves back up, blocking the breakdown and entry mix fuel and compressed air / fuel. The candles in the air and fuel causing the piston down again.

Admission fuel and ventilation in the wall of the cylinder valves eliminate the need and the mechanism of opening and closing, which explains why 2-stroke engines are much simpler in design.

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Why does my Yamaha works half power?

I have a late 80s early 90s Yamaha SS 175 (precision Joint) outboard. I bought the boat with a new oil pump last year and ran great. Now, almost electric current and sockets are the last two oil soaked and I did not smell any gas in them. it has spark!

To see how it is a 2-stroke engine has no valve guides. It appears that you have old gas it. Did you drain the old gas evacuated? I want to do.

GP14 with 4hp Yamaha Engine Test