Spark Plug
Testing and Inspection- Broken, Cracked or Chipped Insulator
- Brown to Gray/Tan Color - Normal Operating Condition
- Dry, Fluffy Black Deposits - Cold or Carbon Fouling
- Electrode Gap Bridging
- Heavy Colored Deposits
- Overheating
- Premature Electrode Wear - Preignition Damage
- Red, Brown, Yellow or White Deposits - Fuel Additives
- Shiny Yellow Glaze
- Spark Plug Inspection
- Wet Oily Deposits
- White or Gray - Burned or Blistered Insulator
Adjustments
Service and Repair
Specifications
Technical Service Bulletins