MAINTENANCE
43
SPARK PLUG
Do not overtightenthe spark plug. Overtightening the plug can causedamage to the
aluminum cylinder head threads.
1. Remove the spark plug when the engine is cold.
2. Inspect and replace the spark plug at the intervals indicated in the SCHEDULED MAINTENANCE CHART on
page 30.
3. Apply a light coat of anti-seize compound to the spark plug threads.
4. Tighten to 16 ft. lbs. (22 Nm) torque.
Tools
• spark plug socket, 13/16” • torque wrench, ft. lbs
• ratchet • feeler gauge
• anti-seize compound
INSPECT CONDITION OF SPARK PLUG ACTION
Electrode
Sooty Clean carefully with a wire brush.
Worn or damaged Replace spark plug.
Condition of plug
Fouled (indicated by a wet, black appearance)
possibly caused by:
• dirty air filter element or other restrictions in
the air intake system
Clean air system. Replace spark
plug.
• incorrectly adjusted valves Adjust valves. Replace spark plug.
• park plug wire in poor condition Repair or replace wire. Replace
spark plug.
• poor fuel quality Change fuel.
Replace spark plug.
Porcelain insulator Visible cracks Replace spark plug.
Gap
Correct gap (see illustration at right) Reinstall spark plug.
Incorrect gap (see illustration at right) Adjust to correct measurement.
.030 in.
.76 mm
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