17Service maintenance guideArea Maintenance Page Before use MonthlyAir filter Clean / Replace 19 •Fuel system Inspect 19 •Fuel filter Inspect / Clean / Replace 19 •Spark plug Inspect / Clean / Adjust / Replace 19 •Cooling system Inspect / Clean 19 •Carburettor Adjust / Replace and adjust 20 •Silencer Inspect / Tighten / Clean 20 •Drive shaft Grease 20 •*Starter Inspect (18) •Cut off knife Inspect / Clean - •Screws, bolts and nuts Inspect, Tighten / Replace - •IMPORTANTTime intervals shown are maximum.Actual use and your experience will determine the frequency of required maintenance.* Or 50 hours, whichever occurs first.