TOHATSU BFT 250A Owner's Manual page 71

SPARK PLUG WRENCH
6. Remove the spark plugs with a
spark plug wrench and 19 mm eye
wrench.
New plug
19 mm EYE
WRENCH
7. Inspect the spark plugs. Replace
them if the electrodes are worn, or
if the insulators are cracked or
chipped.
SERVICING YOUR OUTBOARD MOTOR
Plug needing
0.039 – 0.043 in
replacement
(1.0 – 1.1 mm)
8. Measure the spark plug electrode
SIDE ELECTRODE
SEALING
WASHER
INSULATOR
gap with a wire-type feeler gauge.
Correct the gap, if necessary, by
carefully bending the side
electrode.
The gap should be:
0.039 – 0.043 in (1.0 – 1.1 mm)
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