Thread: Checking spark plugs for fuel mixture
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Old 07-04-2004, 04:04 PM
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Bruce Edwards Bruce Edwards is offline
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Basic rule of thumb, black with soft carbon to rich, very light tan to white to lean, a nice medium tan is what you want to look for. You need to look at just the tip, center electrode and ground wire as the unleaded fuel will leave a black trace on the edge of the plugs even if they are running a good mix.
Check this site
http://www.bullittarchive.com/Mainte...g_Spark_Plugs/
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Last edited by Bruce Edwards; 07-04-2004 at 04:08 PM..
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