A dirty air filter can cause a difficult starting, a loss of power, bad functioning and accelerated wear of the engine. The cleanliness of the air filter must always be guaranteed. Inspect the air filter condition after each use, clean it if needed, or at least every 25 hours. Change the filtering element every 200 hours or if it shows some weaknesses.
Several types of air filters exist according to the engine:
Foam air filter: Remove the element and clean it with gasoline. Dry it in the sun. Saturate with engine oil, then press firmly to spread evenly the oil and remove the excess. Put it back into its place, respecting the fitting orientation.
Dual-element air filter: Remove the foam filter from the paper filter. Check both elements and replace them if they are damaged.
To clean the paper filter, tap the filter on a hard surface many times to eliminate the dirt or blow compressed air (2Bars max) from the inside. Do not use a brush for this operation.
To clean the foam element, Clean the casing of the air filter. Put the filter and the cover back in place. For more explanations, see the engine instruction manual.