Spark plugs

Normally a "Good Burn" produces a "Tan-ish" color on a spark plug, the part you are concentrating on, is the CERAMIC Part, that the Electrode protrudes from. Blacker is "RICH"----Whiter is "LEAN"----the Tan varies in shade, A Repair manual usually has photos of this

This site was recently UPGRADED, I have not explored it much. There may be pics here also."You Tube" is a wonderful source of info also!

Let me know how this works for you

The Medic