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Tim Ayers · 05-22-2022, 01:05 PM

Of course, I didn't check this until after the motor was together. Ugh. Plug holes are .750". NGK BL-4's are way too short.

I'll figure out the spacer deal, but what is the NGK plug that works for this situation?

05-22-2022, 01:05 PM	#135
Tim Ayers Senior Member Join Date: May 2010 Location: NJ Posts: 6,181	Re: Spark Plug Protrusion into Head? Of course, I didn't check this until after the motor was together. Ugh. Plug holes are .750". NGK BL-4's are way too short. I'll figure out the spacer deal, but what is the NGK plug that works for this situation?