100 MAINTENA NCE AND ADJUSTMENT
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A. C ooling Fan
B. Screen
Spark Plug
The standard spark pl
ug is shown in the table. The
spark plug should be taken out periodically in ac-
cordance with the Periodic Maintenance Chart for
cleaning, inspectio
n, and resetting of the plug gap.
Maintenance
If the plug is oily or has carbon built up on it,
clean it. The plug may also be cleaned using a
high flash-point solvent and a nonmetal brush (ny-
lon etc.). Measure the gap with a wire-type thickness
gauge, and adjust the gap if incorrect by bending the
outer electrode. If the insulator is cracked, replace
the plug. Use the standard plug.
A. Gap