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0.7 - 0.8 mm
0.028 - 0.031 in.
Air Filter Maintenance
For proper performance and long life, keep air filter
clean.
1. Turn knob and remove the maintenance cover.
2. Turn the screw (A) in the center of air filter cover
to release. Remove cover (B) and set aside.
3. Remove the filter element (C).
4. If the filter element is dirty, clean with warm,
soapy water. Rinse and let dry.
5. Apply a light coat of engine lubricant to the
element, then squeeze it out.
6. Replace the element (C) in the air filter unit (D).
7. Replace the air filter cover (B) and fasten
screw (A) securely.
A
C
D
B
Spark Plug Maintenance
The spark plug must be properly gapped and free of
deposits in order to ensure proper engine operation.
To check:
1. Turn knob and remove the maintenance cover.
2. Remove the spark plug cap (B).
3. Clean any dirt from around base of spark plug.
4. Remove spark plug (A) using provided wrench.
5. Inspect spark plug for damage, and clean with a
wire brush before reinstalling. If insulator is
cracked or chipped, spark plug should be replaced.
6. Measure plug gap. The correct gap is 0.028-0.031
in. (0.7-0.8 mm). To widen gap, if necessary,
carefully bend the ground (top) electrode. To
lessen gap, gently tap ground electrode on a hard
surface.
7. Seat spark plug in position; thread in by hand to
prevent cross-threading.
8. Tighten with wrench to compress washer. If spark
plug is new, use 1/2 turn to compress washer
appropriate amount. If reusing old spark plug, use
1/8 to 1/4 turn for proper washer compression.
NOTE:
An improperly tightened spark plug will become
very hot and could damage the engine.
9. Reinstall the spark plug cap (B).
Checking and adjusting valve clearance must be
done when the engine is cold.
NOTICE
0.003~0.004 inch
0.08~0.11 mm
0.003~0.004 inch
0.08~0.11 mm
10-12 N·M 10-12 N·M
Intake Valve Exhaust Valve
Valve Clearance
Valve
Clearance
Torque
Important: Please contact Authorized Service Center
for service assistance. Proper valve clearance is
essential for prolonging the life of the engine. Check
valve clearance per maintenance schedule.
A
B
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