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SPARK PLUG SERVICE
5. Visually inspect the spark plug. Replace it if the electrode is worn, or if the insulator is cracked,
chipped or fouled. Clean the spark plug with a wire brush if it is to be reused.
6. Measure the spark plug electrode gap with a wire-type feeler gauge.
The gap should be 0.024-0.028in (0.6-0.7mm). Correct as necessary by carefully bending the side
electrode.
7. Check the sealing washer is in good condition, and thread the spark plug in by hand to prevent
cross-threading.
8. After a new spark plug has been seated by hand, it should be tightened 1/2 turn with a wrench
to compress its washer. If a used plug is being reinstalled, it should only require 1/8 to 1/4 turn
after being seated.
9. Reinstall the spark plug cap on the spark plug securely.
10. Reinstall the spark plug maintenance cover.
CAUTION
■A loosen spark plug can overheat and damage the engine. Overheating the
spark plug can damage the threads in the cylinder head.
■Never use a spark plug with an improper heat range.
■Never use a spark plug without damping resistance or it will cause no AC
output.
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