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19Fordy · 08-19-2020, 05:38 PM

I am no expert but, I think having plugs where the firing tip is inside the threaded recess results in fouling. Try a plug with a longer reach. Make sure plug doesn't hit the piston.

08-19-2020, 05:38 PM	#2
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,942	Re: AutoLite 216's in Offy heads I am no expert but, I think having plugs where the firing tip is inside the threaded recess results in fouling. Try a plug with a longer reach. Make sure plug doesn't hit the piston.