FUEL FILTER
Maintenance Interval
• The fuel filter should be cleaned and inspected for
damage after each 20 hours of operation.
• The fuel filter should be replaced after every 100 hours of
operation.
Fuel Filter Replacement
The fuel filter is attached to the end of the fuel pick-up
hose inside the fuel tank.
To replace the fuel filter:
1. Make sure the fuel tank is empty.
2. Remove the fuel cap.
3. Using a wire hook, gently pull the fuel filter out through
the fuel filler opening.
4. Grasp the fuel hose next to the fuel filter fitting and
remove the filter, but do not release the hose.
5. While still holding on to the fuel hose, attach the new
fuel filter.
6. Drop the new fuel filter back into the fuel tank.
7. Make sure that the fuel filter is not stuck in a corner of
the tank, and that the fuel hose is not doubled over
(kinked) before refueling.
COOLING FINS
Maintenance Interval
The cylinder cooling fins should be cleaned after every 25 hours 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.
Cooling Fin Cleaning
1. With the engine at ambient (room) temperature, loosen
the knob at air cleaner cover.
2. Remove the five screws retaining the top cover, then
remove the top cover.
3. Clean all dirt and debris from the cooling fins and from
around the cylinder base.
4. Reinstall the top cover and tighten the knob.
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. With the engine at ambient (room) temperature, 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.
.024-.028 in (0.6- 0.7 mm)
4. Adjust the electrode air gap to .024-.028 in (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 95-148 in. lbs. (10.7-16.6 N・m).
AIR CLEANER
COVER
SCREW
English-11
KNOB
SCREW