Servicing the Spark Plug (continued)
3. Clean the area around the base of the plug to keep dirt and debris out of the engine.
4. Remove the spark plug.
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Checking the Spark Plug
IMPORTANT
Do not clean the spark plug(s). Always replace the spark plug(s) when it has a black
coating, worn electrodes, an oily film, or cracks.
If you see light brown or gray on the insulator, the engine is operating properly. A black
coating on the insulator usually means the air cleaner is dirty.
Set the gap to 0.75 mm (0.03 inch).
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Maintenance: Engine Maintenance Page 5–10 3464-634 A
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