Honda GX25 Owner's Manual page 22

04/09/17 11:28:15 32Z0H600_022
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.
When installing a new spark plug, tighten 1/2 turn after the spark
plug seats to compress the washer. When reinstalling a used spark
plug, tighten 1/8 1/4 turn after the spark plug seats to compress
the washer.
8. Attach the spark plug cap.
9. Install the top cover, and tighten the 5 mm hex bolt securely.
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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