MAINTENANCE
5. Install the spark plug carefully, by hand, to avoid cross-threading.
Use a spark plug wrench to tighten the plug enough to compress
the washer. For a used plug, tighten l/8 to 114 of a turn after the
spark plug seats. For a new plug, tighten l/2 turn after the spark
plug seats.
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A loose spark plug can become hot enough to damage the
engine. Overtightening a spark plug can damage the threads in
the engine.
6. Reconnect the spark plug cap.
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