Spark Plug: Testing and Inspection

Check the following and replace the spark plugs as necessary.
- Damaged insulation
- Worn electrode

- Carbon deposits
- If cleaning is necessary, use a plug cleaner or a wire brush. Wipe upper insulator.

- Damaged gasket
- Burnt condition
- Plug gap

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