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U16FER9 (DENSO)
CR5EH-9 (NGK)
61
Spark Plug Service
SERVICING YOUR OUTBOARD MOTOR
SPARK PLUG
WRENCH
SPARK PLUG CAP
0.031
0.035 in
(0.80
0.90 mm)
Incorrect spark plugs can cause
engine damage.
RECOMMENDED SPARK PLUGS:
Unlatch and remove the engine
cover (p.
Disconnect the spark plug caps
from the spark plugs.
Remove the spark plugs with a
spark plug wrench and screwdriver
supplied in the tool kit.
Inspect the spark plugs. Replace
them if the electrodes are worn, or
if the insulators are cracked or
chipped. Clean the spark plugs
with a wire brush if you are going
to reuse them.
Measure the spark plug electrode
gap with a suitable gauge. The gap
should be 0.031
0.035 inches
(0.80
0.90 mm).
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02/03/25 21:01:31 31ZW8A00_062