A lawn mower’s air filter keeps dust and other particles from entering your engine. The mower filter should be replaced every three months to keep your lawn mower engine and parts running smoothly.

How do I know if my air filter needs changing?

The most obvious sign that you need a new air filter is if the one you have is gray and dirty. Make it a point to pull the air filter out and take a look at it at least once every other month. If it looks dirty or dusty, replace it.

What happens if lawn mower air filter is dirty?

A clogged air filter covered in oil and dirt will smother your engine, not allowing the proper amount of air to burn with the fuel. Less combustion power means less horsepower. If you notice your mower is not maintaining consistent power, check your air filter.