Spark Plug Service; Recommended Spark Plug - Honda F210 Owner's Manual

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3. Spark plug service
Recommended
spark plug:
BMR-4A
(NGK)
W14MR-U
(ND)
To ensure proper engine operation,
the spark plug must be properly
gapped
and free of deposits.
\
1. Remove the spark plug cap.
B
If the engine has been running,
the muffler
will be very hot. Be
careful not to touch the muffler.
2. Visually
inspect
the spark plug. Discard
it if the insulator
is cracked or
chipped.
Clean the spark plug with a wire brush if it is to be reused.
3. Measure the plug gap with a feeler gauge. The gap should be 0.6-0.7
mm
(0.024-0.028
in). Correct as necessary by bending the side electrode.
OS-Q.7
mm
(0.024-0.028
in)
4. Thread the plug in by hand to prevent cross-threading.
5. After
seating it by hand, tighten a new spark plug l/2 turn with the wrench
to compress the washer. If you are reusing a plug, it should only take l/B-
l/4 turn.
I
i
CAUTION:
The spark plug must be securely tightened.
An improperly
tight-
ened plug can become very hot and possibly
damage the engine. Never use a
spark plug with an improper
heat range.

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