Spark Plug Service - Honda BF4A Owner's Manual

SERVICING YOUR OUTBOARD MOTOR

Spark Plug Service

RECOMMENDED SPARK PLUG:
BKR6E-E (NGK)
Incorrect spark plug can cause
engine damage.
SPARK PLUG WRENCH
SPARK PLUG CAP
1. Unlock and remove the engine
cover (p. 62).
2. Disconnect the spark plug cap from
the spark plug.
3. Remove the spark plug with a
spark plug wrench and screwdriver
provided in the tool kit.
68
New plug Plug needing
replacement
4. Inspect the spark plug. Replace it if
the electrode is worn, or if the
insulator is cracked or chipped.
SIDE ELECTRODE
0.024 - 0.028 in
(0.6 - 0.7 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:
0.024 - 0.028 in (0.6 - 0.7 mm)