Operator's Manual

18
Air Filter
Maintenance Interval
• The air filter should be cleaned daily, or more often
when working in extremely dusty conditions.
• Replace after every 100 hours of operation.
Air Filter Cleaning
1. Unsnap the air filter cover (Fig. 21).
2. Remove the foam filter (Fig. 21).
3. Clean the filter with warm, soapy water. Let the filter
completely dry.
4. Apply a light coat of SAE 30 motor oil to the foam
filter and squeeze out all excess oil.
5. Reassemble the filter and filter cover (Fig. 21).
m-2930
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Figure 21
1. Air Filter Cover 2. Foam Filter
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 (CJ8Y) after every 100 hours
of operation.
Spark Plug Maintenance
1. With the engine at ambient (room) temperature,
remove the socket head screw holding the muffler
cover, then remove the muffler cover (Fig. 26).
2. Loosen the cylinder cover screw and lift off the
cylinder cover (Fig. 22).
m-2934
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Figure 22
1. Screw 2. Cylinder Cover
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. 23).
6. Adjust the electrode air gap to .024–.028 in.
(0.6–0.7mm) (Fig. 23).
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 NSm).
9. Reinstall the cylinder and muffler covers (Figs. 22 and
26).