Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la
If it fails: lemon-manuals.org.ua

Or, hide this message: temporarily or permanently

Spark Plug: Testing and Inspection

CAUTION
- Be sure to follow the instructions shown below. Otherwise, the platinum electrode can be damaged.
- Do not use a wire brush to clean the electrode.
- Use a plug cleaner for a maximum of 20 seconds and air pressure below 588 kPa {6.00 kgf/sq.cm, 85.3 psi}
- Do not adjust the plug gap.