The function of an air filter is to remove dust, sand, grass and other dirt from the air stream before it enters the engine. Without a filter, this material would scrub the piston and cylinder, causing premature motor wear over time. Dirt will also clog small streams that flow from fuel from inside the carburetor.
The air filter must be clean for optimum engine operation. A dirty, clogged air filter will deprive an oxygen engine, causing a reduction in power, excessive fuel consumption or carburetor flooding, and difficulty starting. The foam elements can be washed with hot water and soap to remove oil and dirt. Then squeeze the dry foam into a cloth. Pour a teaspoon of motor oil into the foam and massage evenly through the element (the function of the oil is to catch the dust passing through the foam). It is possible to clean some of the dust from a paper filter blowing from the inside with compressed air. However, this type of filter should ideally be replaced.
- Paper air filter.
- Foam air filter.
