Spark Plug: Service and Repair

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 (0.039 - 0.043 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.