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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 Fins Cleaning
1. Remove the air filter cover.
2. Remove the plug cap.
3. Loosen the knob and lift off the top cover. Clean all dirt
and debris from the cooling fins and from around the
cylinder base. Reinstall the top cover and the air filter
cover.
Air Filter Cover
Cooling
Fins
Plug Cap
Top Cover
Knob