Honda HT3810 Owner's Manual page 45

3. Spark plug service.
Recommended spark plug: BR4HS (NGK)
To ensure proper engine operation, 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.
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SPARK PLUG WRENCH
w
I
SPAFiK PLUG CAP
4. 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.
5. Measure the plug gap with a feeler gauge.
The gap should
be 0.6 -0.7 mm (0.024~0.028 in). Correct as
I
necessary by carefully bending the side electrode.
0.6-0.7 mm
(0.024-0.028
in)
43