Products
Mopeds
Minibikes
Utility
Media
Photo gallery
Tomos history
Tomos racing
Moped fans
Tech corner
BT 50 Engine Data
A5 Engine Data
Tuning
Troubleshooting
Spare parts
Editorials
A5 Colibri
Dealer horror stories
Testimonials
Tomos™ Nederland
White papers:
Gearbox oil
Anti-theft
 |
|
| Home |
Spark plug condition table
 |
 |
| Brown or grayish color indicates correct running conditions | White deposits indicate incorrect mixture oil ratio or use of low quality oil |
 |
 |
| Black deposits indicate too rich fuel/air ratio-try hotter spark plug | Wet oil deposits indicate ignition system problem or worn-out engine |
 |
 |
| Melted electrodes indicate ignition timing problem or overheating-try cooler spark plug | Increased gap between electrodes indicates worn-out spark plug-replace spark plug |