SERVICING YOUR PUMP
33
5. Check that the spark plug
washer is in good condition, and
thread the spark plug in by hand
to prevent cross-threading.
6. After the spark plug is seated,
tighten with a spark plug wrench
to compress the washer.
If installing a new spark plug,
tighten 1/2 turn 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
A loose spark plug can overheat and damage the engine.
Overtightening the spark plug can damage the threads in the
cylinder head.
7. Reconnect the spark plug cap.