−
−
−
The spark plug must be securely tightened.
An improperly tightened plug can become
very hot and possibly damage the engine.
Reinstall the spark plug cap.
Make sure the plug washer is in good
condition.
With the plug washer attached, thread
the spark plug in by hand to prevent
cross-threading.
Tighten a new spark plug 1/2 turn with a
spark plug wrench to compress the
washer. If you are reusing a plug, it
should only take 1/8 1/4 turn after the
plug seats.
Visually inspect the spark plug electrodes
for wear. The center electrode should
have square edges and the side electrode
should not be eroded.
Discard the spark plug if there is
apparent wear or if the insulator is
cracked or chipped.
Check the spark plug gap ( ) using a
wire-type feeler gauge. If adjustment is
necessary, bend the side electrode ( )
carefully.
The gap should be:
6.
3.
4.
5.
7.
8.
(2)
(3)
2
3
(2) Spark plug gap
(3) Side electrode
67
0.8
0.9 mm (0.03
0.04 in)
02/03/08 18:59:53 32KHA600_077
