Thread: Spark plug preference...Curious
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Old 11-20-2019, 12:07 PM   #11
mfirth
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Join Date: Aug 2017
Location: ohio
Posts: 986
Default Re: Spark plug preference...Curious
Quote:
Originally Posted by 19Fordy View Post
I use NGK # GR4 2635 plug with 11/16 reach on MCF heads vintage 1999.
That was the plug suggested by Mark Kirby of MCF.
1940, are you 12 volt Or 6 positive earth ?
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