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Use only the recommended spark plugs or equivalent plugs. Spark
plugs which have an improper heat range may cause engine
damage.
The spark plug must be securely tightened. An improperly
tightened spark plug can become very hot and may damage the
engine.
PLUG GAP
Measure the plug gap with a feeler gauge.
Correct as necessary by carefully bending the side electrode.
The gap should be:
STANDARD PLUG:
Make sure that the spark plug washer is in good condition and
thread the spark plug in by hand to prevent cross-threading.
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 to
1/4 turn after the spark plug seats.
0.70
0.80 mm (0.028
0.031 in)
BPR5ES (NGK)
W16EPR-U (DENSO)
After the spark plug is seated, tighten with a spark plug wrench to
compress the washer.
5.
6.
7.
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