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Fuel Filter
Maintenance Interval
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 (Fig. 21).
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 (Fig. 21).
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.
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.
12
Spark Plug Maintenance
1.
With the engine at ambient (room) temperature,
loosen the knob and remove the air cleaner cover
(Fig. 8).
2.
Loosen the knob and lift off the cylinder cover
(Fig. 8).
3.
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.
4.
Remove the spark plug.
5.
Clean the electrodes with a stiff brush (Fig. 22).
6.
Adjust the electrode air gap to .024–.028 in.
(0.6–0.7mm) (Fig. 22).
7.
Replace the spark plug if it is oil-fouled,
damaged, or if the electrodes are worn down.
8.
Do not overtighten the spark plug when
installing. The tightening torque is 95–148 in.
lbs. (10.7–16.6 N m).
9.
Reinstall the cylinder and air cleaner covers
(Fig. 8).
Cylinder 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 and remove the air cleaner cover
(Fig. 8).
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