The air filter needs to be clean and in good condition in order to stop dirt, dust, and debris from getting into the engine. It is recommended to clean the air filter after every 4 hours of use and should be changed every 100 hours or every 3 months, whichever comes first. Pleated-paper air filters have to be replaced, they were not designed to be cleaned or reused. Foam air filters can be cleaned with hot water and dish detergent then wrung dry and saturated with engine oil before reinstalling into the tiller.
Fuel filters can be removed and cleaned of residue, however if there is debris clogging the mesh screen inside the filter it should be replaced. Some fuel filters are located in the fuel line and others are located inside the fuel tank.
The oil level in tillers should be checked prior to every use and changed every 50 hours of use or once every season. Fresh oil is a golden or amber color and as it gets old and used it will turn darker.
Before storing the tiller, spray a degreaser on greasy and dirty areas, let the it sit for 10-15 minutes then wipe the sprayed area with a clean cloth. Rinse off the tiller with a hose and dry completely.
Tillers require clean, fresh fuel for best performance from the engine. During the off season when your tiller is being stored, the fuel should either be drained from or a fuel stabilizer should be added to prevent clogs in the carburetor.
Clean the tines after each use, and then spray them with a lubricant to protect them from rusting.