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SERVICING YOUR OUTBOARD MOTOR
SIDE ELECTRODE
0.031 – 0.035 in
(0.8 – 0.9 mm)
SEALING WASHER
INSULATOR
5. Measure the spark plug electrode
gap with a wire-type feeler gauge.
Correct the gap, if necessary, by
carefully bending the side
electrode.
The gap should be:
0.031 – 0.035 in (0.8 – 0.9 mm)
88
6. Install the spark plugs carefully, by
hand, to avoid cross-threading.
7. After each spark plug seats, tighten
with a spark plug wrench and 10
mm box wrench to compress the
sealing washer.
If reinstalling used spark plugs,
tighten 1/8 – 1/4 turn after the
spark plugs seat.
If installing new spark plugs,
tighten 1/2 turn after the spark
plugs seat.
Loose spark plugs can overheat
and damage the engine.
Overtightening the spark plugs can
damage the threads in the cylinder
head.
8. Attach the spark plug caps.
9. Install and lock the engine cover.
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