Servicing your outboard motor – HONDA Outboard Motor BF90A User Manual
Page 85
X22ESR-U (DENSO)
DR7EA (NGK)
83
Spark Plug Service
SERVICING YOUR OUTBOARD MOTOR
SPARK PLUG
WRENCH
SEALING
WASHER
0.024
0.028 in
(0.60
0.70 mm)
Incorrect spark plugs can cause
engine damage.
RECOMMENDED SPARK PLUGS:
Disconnect the spark plug caps
from the spark plugs.
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.
Unlock and remove the engine
cover (p.
Measure the spark plug electrode
gap with a suitable gauge. The gap
should be 0.024
0.028 inches
(0.60
0.70 mm).
Remove the spark plugs with a
spark plug wrench.
1.
2.
3.
4.
5.
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