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5. Inspect the spark plug. Replace
it if the electrode is worn or
fouled, or if the insulator is
cracked or chipped.
6. Measure the spark plug
electrode gap with a wire-type
feeler gauge. Correct the gap, if
necessary, by carefully bending
the side electrode.
The gap should be:
0.028–0.031 in (0.7–0.8 mm)
7. Make sure that the spark plug
sealing washer is in good condition, and thread the spark plug in by
hand to prevent cross-threading.
8. After the spark plug is seated, tighten with a spark plug wrench to
compress the washer.
If reinstalling a used spark plug, tighten 1/8–1/4 turn after the spark
plug seats.
If installing a new spark plug, tighten 1/2 turn after the spark plug
seats.
TORQUE: 13.3 lbf·ft (18 N·m, 1.8 kgf·m)
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the cylinder
head.
9. Attach the spark plug cap.
10. Reinstall the spark plug inspection cover and tighten the cover
screw.
11. Close the left maintenance cover.
SERVICING YOUR GENERATOR
SIDE ELECTRODE
0.028–0.031 in
(0.7–0.8 mm)
SEALING WASHER
INSULATOR
61
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