Honda GX360 Owner's Manual page 41

SERVICING YOUR HONDA ENGINE
SPARK PLUG SERVICE
Recommended spark plugs: BPR4HS(NGK)
I
NOTICE
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Incorrect spark plugs can cause engine damage.
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1. Disconnect the spark plug caps, and remove any
dirt from around
the spark plug area.
2. Remove the spark plugs with a 13/16-inch spark plug wrench.
SPARK PLUG CAP
3. Inspect the spark plugs. Replace
0.024-0.028in
them if the electrodes are worn,
(0.60-0.70mm)
or if the insulator is cracked or
chipped. Clean the spark plugs
with a wire brush if you are going
to reuse them.
4. Measure the spark plug electrode
gap with a suitable gauge. The
g a p s h o u l d b e 0.024-0.028 i n
(0.60-0.70 mm). Correct the gap,
if necessary, by carefully bending
the side electrode.
5. Install the spark plugs carefully,
by hand, to avoid cross-threading.
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