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REGULAR MAINTENANCE
AIR FILTER
Maintenance Interval: The air filter should be cleaned
daily or more often when working in extremely dusty con-
ditions and replaced after every 100 hours of operation.
Maintenance: Push and open the air filter cover.
Remove the foam filter. Clean the filter with warm, soapy
water. Let the filter completely dry. Lightly apply SAE 30
motor oil to the foam filter and squeeze out all excess oil.
Reassemble the filter and filter cover.
FUEL FIL
TER
Maintenance Interval: The fuel filter should be replaced after
every 100 hours of operation.
Maintenance: The fuel filter is attached to the end of the fuel
pick-up hose inside the fuel tank. To replace the fuel filter, first
make sure the fuel tank is empty. Remove the fuel cap. Using
a wire hook, gently pull the fuel filter out though the fuel filter
opening. Grasp the fuel hose next to the fuel filter fitting and
remove the filter but do not release the hose. While still
holding on to the fuel hose, attach the new fuel filter. Drop the
fuel filter back into the fuel tank. 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
and replaced after every 100 hours of operation.
Maintenance: With the engine at ambient (room) tempera-
ture, remove the one screw retaining the muffler cover, then
remove the muffler cover. Loosen the cylinder cover screw
and lift off the cylinder cover. (Refer to the illustration shown in the following CYLINDER COOLING
FINS section.) Twist the high tension lead boot on the spark plug back and forth a couple of times
to loosen boot then pull the boot off of the spark plug. Remove the spark plug. The electrodes can
be cleaned with a stiff brush. Adjust the electrode air gap to 0.6
−
0.7 mm (0.024
−
0.028 in.).
Replace the spark plug if it is oil-fouled, damaged or if the electrodes are worn down. Do not
overtighten the spark plug when installing. The tightening torque is 10.7
−
16.6Nm (95
−
148 in.
lbs.). Reinstall the cylinder and muffler covers.
TIPS
0.6
−
0.7 mm
(0.024
−
0.028 inches)
FOAM FILTER
AIR FILTER
COVER
OPEN
PUSH
FUEL TANK
WIRE
FUEL FILTER
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