Spark Plug: Testing and Inspection

1. Check that the plug is not burned, that the insulator plug is not damaged, and that the seizure state is good.
2. If cleaning is required due to carbon deposits, etc., clean using a plug cleaner or wire brush, etc.
3. Check the plug gap using a plug gap gauge, and adjust if not within the standard value.

Standard value: 1.0 - 1.1 mm (0.039 - 0.043 inch)