Honda GXV120 Owner's Manual page 21

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- 114 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.
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