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flatjack9 · 11-14-2019, 05:30 PM

I just tried the Champion N5C in a new set of Offy heads and they required .200 spacer to get the base of the plug flush with the cylinder head. With .120, they hit the plug electrode. Same with the NGK BR7ES.

11-14-2019, 05:30 PM	#105
flatjack9 Senior Member Join Date: May 2010 Location: Oshkosh, Wi Posts: 4,526	Re: Spark Plug Protrusion into Head? I just tried the Champion N5C in a new set of Offy heads and they required .200 spacer to get the base of the plug flush with the cylinder head. With .120, they hit the plug electrode. Same with the NGK BR7ES.