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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Spark Plug Usage

^ Verify that the correct spark plug is installed. An incorrect spark plug causes driveability conditions. Refer to Ignition System Specifications for the correct spark plug.
^ Ensure that the spark plug has the correct heat range. An incorrect heat range causes the following conditions:
- Spark plug fouling colder plug
- Pre-ignition causing spark plug and/or engine damage - hotter plug