
CHAIN SHARPENING Chain sharpening is a complicated task that requires special tools. We recommended you refer chain sharpening to a professional chain sharpener. IGNITION TIMING Ignition timing is fixed and nonadjustable. SPARK PLUG The spark plug should be replaced each year to ensure the engine starts easier and runs better. S Loosen 3 screws on cylinder cover. S Remove the cylinder cover. S Pull off the spark plug boot. S Remove spark plug from cylinder and dis card. S Replace with Champion R