Spark Plug Service - Honda FG400 Owner's Manual

SERVICING YOUR HONDA TILLER
SPARK PLUG SERVICE
Recommended spark plug: BPR6ES (NGK)
Incorrect spark plugs can cause engine damage.
1. Disconnect the spark plug cap, and remove any dirt from around the spark
plug area.
2. Remove the spark plug with a 13/16-inch spark plug wrench.
I ' \ -
1
I f
/
PULG WRENCH
3. Inspect the spark plug. Replace it if the
electrodes are worn, or if the insulator
(0.70
-
0.80 mm)
is cracked or chipped.
4. Measure the spark plug electrode gap
with a suitable gauge. The gap should
be 0.028
-
0.031 in (0.70
-
0.80 mm).
Correct the gap, if necessary, by care-
fully bending the side electrode.
5. Install thesparkplug carefully, by hand,
to avoid cross-threading.
6.
After the spark plug seats, tighten with
a 13/16 - inch spark plug wrench to
compress the washer.
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