Honda WT20X Owner's Manual page 22

3. Spark plug service
Recommended spark plug: WTZOX*WTSOX WT40X
BPRGES (NGK)
BPRGES-1 1 (NGK)
WZOEPR-U (ND) WZOEPR-Ul 1 (ND)
To ensure proper engine operation, the spark plug must be properly gapped
and free of deposits.
1. Remove the spark plug.
Iam!
The muffler becomes very hot during operation and remains hot
for a while after stopping the engine. Be careful not to touch the muffler
while it is hot.
2.
3.
MUFFLER
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.
Measure the plug gap with a feeler gauge. The gap should be 0.7-0.8
mm (0.028-0.031 in). Correct as necessary by bending the side
electrode.
WTZOX. WT30X
0.7-0.8 mm
(0.028-0.031 in)
tj
WT40X
1.0-1.1 mm
(0.039-0.043 in)
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