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1
(1) Spark plug cap
4. Remove the spark plug using the
wrench plug provided in the tool kit.
5. Inspect the electrodes and center
porcelain for deposits, erosion or
carbon fouling. If the erosion or
deposit is heavy, replace the plug.
Clean carbon or wet fouled plug with
a plug cleaner.
6. Check the spark plug gap using a wire-
type feeler gauge. If adjustment is
necessary, bend the side electrode (2)
carefully.
2
(2) Side electrode
7. With the plug washer attached,
thread the spark plug in by hand to
prevent cross-threading.
8. Tighten a new spark plug 1/2 turn
with a wrench plug to compress the
washer. If you are reusing a plug, it
should only take 1/8 - 1/4 turn after the
plug seats.
The spark plug must be securely
tightened. An improperly tightened
plug can become very hot and possibly
damage the engine.
9. Reinstall the spark plug cap.
57
0.6 - 0.7 mm
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