Spark Plug: Testing and Inspection

Spark Plug Inspection

Check the following points. If a problem is found, replace the spark plug.
1. Damaged insulation
2. Worn electrodes
3. Carbon deposits
If cleaning is necessary, use a plug cleaner or a wire brush. Clean the upper insulator also.
4. Damaged gasket

Plug gap 1.0 - 1.1 mm { 0.040 - 0.043 in }