5. 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.
6. Measure the plug gap with a feeler gauge.
The gap should be 0.024-0.028in (0.6-0.7mm). Correct as necessary by carefully bending the
side electrode.
7. Install the spark plug carefully, by hand, to avoid cross-threading.
8. After a new spark plug has been seated by hand, it should be tightened 1/2 turn with a wrench
to compress its washer. If a used plug is being reinstalled, it should only require 1/8 to 1/4 turn
after being seated.
9. Reinstall the spark plug cap on the spark plug securely.
10. Reinstall the spark plug maintenance cover.
■The spark plug must be securely tightened. An improperly tightened
plug can become very hot and possibly damage the generator.
■Never use a spark plug with an improper heat range.
■Never use a spark plug without damping resistance or it will cause
no AC output.
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