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Cylinder Cooling Fins
Maintenance Interval
・
The cylinder cooling fins should be cleaned after every 25hours of operation, or once a week, whichever
comes first.
・
Air must flow freely around and through the cylinder cooling fins to prevent engine overheating. Leaves,
grass, dirt and debris buildup on the fins will increase the operating temperature of the engine, which can
reduce engine performance and shorten engine life.
Spark Plug
Maintenance Interval
・
The spark plug should be removed from the engine and
checked after each 25 hours of operation.
・
Replace the spark plug after every 100 hours of operation.
Spark Plug Maintenance
1. Twist the high tension lead boot on the spark plug back
and forth a couple of times to loosen the boot, then pull
the boot off of the spark plug.
2. Remove the spark plug.
3. Clean the electrodes with a stiff brush.
4. Adjust the electrode air gap to 0,6-0,7 mm.
5. Replace the spark plug if it is oil-fouled, damaged, or if the
electrodes are worn down.
6. Do not over tighten the spark plug when installing. The
tightening torque is 10,7-16,6 N·m.
0,6-0,7mm
Cooling Fin Cleaning
1. Loosen the knob and remove the filter cover.
2. Twist the high tension lead boot on the spark plug back and forth a couple of times to loosen the boot,
then pull the boot off of the spark plug.
3. Loosen the knob and lift off the cylinder cover.
4. Clean all dirt and debris from the cooling fins and from around the cylinder base.
5. After cleaning, reinstall the cylinder cover, high tension lead boot and the filter cover.
Cylinder Cover
Cooling
Fins
Filter Cover
High Tension Lead Boot
Knob
Knob