HONDA BF50D - Manual (Page 77)

0.024 0.028 in
(0.6 0.7 mm)
75
SERVICING YOUR OUTBOARD MOTOR
SIDE ELECTRODE
0.024 0.028 in
(0.6 0.7 mm)
SEALING WASHER
INSULATOR
Loose spark plugs can overheat
and damage the engine.
Overtightening the spark plugs
can damage the threads in the
cylinder head.
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:
Install the spark plugs carefully,
by hand, to avoid cross-threading.
After each spark plug seats, tighten
with a spark plug wrench to
compress the sealing washer.
If reinstalling used spark plugs,
tighten 1/8
1/4 turn after the
spark plugs seat.
If installing new spark plugs,
tighten 1/2 turn after the spark
plugs seat.
Attach the spark plug caps.
Install and lock the engine cover.
5. 6.
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