If the spark plugs have a matte black or grey appearance, it could be carbon fouling —something typically caused by a fuel mixture that is too rich. In this video, we look at how to interpret spark plug electrode and insulators appearance to diagnose fuel conditions. 

Approx. Course Time: 5 minutes

Sponsored By:

Current Status
Not Enrolled
Price
Free
Get Started

Course Content

Expand All

This course includes:

Questions?

No worries. Send us a quick message and we’ll be happy to answer any questions you have.