Honda GCV135 User Manual page 23

2. Visually inspect the spark plug. Discard the spark plug if there is
apparent wear, or if the insulator is cracked or chipped. Clean
the spark plug with a wire brush if it is to be reused.
3. Measure the plug gap with a feeler gauge. Correct as necessary
by bending the side electrode.
The gap should be:
0.70 0.80 mm (0.028 0.031 in)
0.70 0.80 mm
(0.028 0.031 in)
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