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X22ESR-U (DENSO)
DR7EA (NGK)
68
Spark Plug Service
SERVICING YOUR OUTBOARD MOTOR
SPARK PLUG
WRENCH
SPARK PLUG CAPS
0.024
0.028 in
(0.60
0.70 mm)
SEALING WASHER
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.
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.
Inspect the spark plugs. Replace
them if the electrodes are worn, or
if the insulators are cracked or
chipped.
1.
2.
3.
4.
5.
03/04/26 19:22:05 31ZW3600_069
Summary of Contents for Marine BF40A
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