Discard it if the insulator is cracked
or chipped. Clean the spark plug
with a wire brush if it is to be reused.
5. Measure the plug gap with a feeler gauge.
Correct as necessary by carefully bending the
side electrode.
The gap should be: 0.70-0.80 mm (0.028-0.031 in)
MAINTENANCE
6. Check that the spark plug washer is in good condition, and thread the spark plug in by hand to prevent
cross-threading.
7. After the spark plug is seated, tighten with a spark plug wrench to compress the washer.
-If installing a new spark plug, tighten 1/2turn after the spark plug seats to compress the washer. If reinstalling a
used spark plug, tighten 1/8-1/4 turn after the spark plug seats to compress the washer.
NOTICE
The spark plug must be securely tightened. An improperly tightened spark plug can become very hot and could
damage the engine.
Never use spark plugs which have an improper heat range. Use only the recommended spark plugs or
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