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View Full Version : Black soot on the spark plug,is it the plug.


Eberhardt
Sep 19, 2007, 11:45 AM
My lawn mower plug has black soot on it, what could be the cause of the plug fouling out? It is a 6.0 B&S motor, also is there a certain gap for the plug and if so what is it? This problem just recently came up after 3 years of use and I don't understand what happen.:confused:

MOWERMAN2468
Sep 19, 2007, 06:25 PM
Too rich of fuel mixture. . 030" gap.