Spark Plug Service - Honda H4013 Owner's Manual

Spark Plug Service
Recommended spark plug: BPR5ES (NGK), WlGEPR-U (ND)
m
Touching a hot engine or exhaust system can cause serious
burns. Let the engine cool before performing maintenance.
IMPORTANT NOTICE
engine damage.
1 Spark plugs of the wrong heat range can cause
For best performance, the spark plug must be properly gapped and free of
deposits.
1. Open the engine hood and remove the spark plug cap.
2. Clean any dirt from around the spark plug base.
3. Use a spark plug wrench to remove the spark plug.
SPARK PLUG WRE>a\ y
4. Visually inspect the spark plug. Discard the spark plug if there is ap-
parent wear, or if the insulator is cracked 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.
The gap should be 0.7-0.8 mm (0.028-0.031 in). Correct as
necessary by carefully bending the side electrode.
0.7-0.8
mm
(0.028-0.031
in)
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