Spark Plug: Testing and Inspection

Spark Plug Check And Cleaning:

1. Remove the spark plug cables.

CAUTION : When pulling the spark plug cable boot from the plug, always hold the boot, not the cable.

2. Remove the spark plugs.
3. Check for a burned-out electrode or damaged insulator. Check for even burning.
4. Remove carbon deposits with wire brush or plug cleaner. Remove sand from plug screw with compressed air.
5. Use a gap gauge to check the plug gap.
Standard value: 1.0 - 1.1 mm (.039 - .043 in.)
If the plug gap is not within the standard value range, adjust by bending the ground electrode.
6. Clean the engine plug holes.

CAUTION : Do not allow foreign matter to enter the cylinders.

7. Install the spark plugs.