Operation Manual

4. Check that the spark plug washer is in good condition and thread the

spark plug in by hand to prevent cross-threading.

5. After the spark plug is seated, tighten with a spark plug wrench to com-

press the washer.

NOTE: When installing a new spark plug, tighten l/2 turn after the spark

plug seats to compress the washer. When reinstalling a used spark plug,

tighten l/8- l/4 turn after the spark plug seats to compress the washer.

CAUTION: The spark plug must be securely tightened. An improperly

tightened spark plug can become very hot and may damage the engine.