
Checking Spark Plug
5. Check the spark plug gap using a wire-
type feeler gauge.
If adjustment is necessary, bend the side
electrode carefully.
8. Tighten the spark plug:
●
If the old plug is good:
1/8 turn after it seats
●
If installing a new plug, tighten it twice
to prevent loosening:
a) First, tighten the plug:
The gap should be:
0.80 to 0.90 mm (0.031 to 0.035 in)
NGK:
1/2 turn after it seats.
DENSO: 3/4 turn after it seats.
b) Then loosen the plug.
c) Next, tighten the plug again:
1/8 turn after it seats.
Side electrode
NOTICE
Spark plug gap
6. Make sure the plug washer is in good
condition.
7. With the plug washer attached, thread
the spark plug in by hand to prevent
cross-threading.
9. Reinstall the spark plug cap. Take care
avoid pinching any cables or wires.
Improperly tightened spark plugs can damage the
engine.
If a plug is too loose, a piston may be damaged. If a
plug is too tight, the threads may be damaged.
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