Spark Plug Service - Honda and WT40X Owner's Manual

SERVICING YOUR HONDA PUMP
SPARK PLUG SERVICE
In order to service the spark plug, you will need a spark plug wrench
(commercially available).
Recommended spark plug: BPRGES (NGK)
W20EPR-U (DENSO)
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
SPARK PLUG WRENCH
wrench.
SPARK PLUG CAP
3. Inspect the spark plug. Replace
it if the electrodes are worn, or
if the insulator is cracked or
chipped. Clean the spark plug
with a wire brush if you are
going to reuse it.
0.028-0.031 in
(0.70-0.80
mm)
I
4.Measure the spark plug
electrode gap with a suitable
gauge.
Correct the gap, if necessary, by
carefully bending the side
electrode.
The gap should be:
0.028-0.031 in (0.70-0.80 mm)
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