1Consult the owner’s manual.
Maintenance procedures often vary significantly by model.
2Have a clean air filter in place.
The air filter has the important job of preventing dirt, dust and other debris from entering the carburetor and engine. It should be cleaned or changed every 25 hours of engine operation or once per mowing season. Pleated, paper air filters must be replaced. Foam air filters can be cleaned with hot water and a small amount of detergent and then left to air dry before being saturated with new engine oil and reinstalled.
3Check and change the oil regularly.
Every eight hours of use, check the condition and level of the oil. Fresh oil is golden or amber in color. As it ages, it will darken. Change the oil every 50 hours of use (generally once per season). Always use the oil recommended by the manufacturer for that model.
4Use a clean fuel filter.
Fuel filter replacement is recommended due to high risk of damage to if cleaned.
Spray a degreaser on oil stains. Allow the degreaser to sit for 10-15 minutes before wiping with a clean cloth. Rinse with a hose.
6Clean the cooling fins.
Periodically use a small bristle brush to remove debris from the cooling fins. In most cases, the blower housing will need to be removed to access all of the fins.
Fuel caps have vent holes to allow air into the fuel tank. Check the fuel cap vent holes. Replace the fuel cap if there is blockage from buildup or debris in the vent holes. During the off season, cover or close the fuel cap vent.
For greatest convenience, find a tune-up kit for your small engine.