Honda WMP20X Owner's Manual page 37

MAINTENANCE
Spark Plug Service
Recommended spark plugs:
BPRGES (NGK), W20EPFbU (ND)
To ensure proper engine operation, the spark plug must be
properly gapped and free of deposits.
Allow the engine to cool before servicing the spark plug.
1. Remove the spark Plug
Cap-
SPARK rLVU yyncp(~"
\
2. Clean any dirt from
around the spark plug
base.
3. Use the wrench
supplied to remove the
spark plug.
4. Visually inspect the
spark plug. Discard it if
the insulator is cracked
SPARK PLUG CAP
or chipped. Clean the
spark plug with a wire brush if it is to be reused.
5. Measure the plug gap with a feeler gauge.
Correct as necessary by carefully bending the side electrode.
The plug gap should be:
0.70-0.80 mm (0.028-0.031 in)
PLUG GAP
31