Quote:
Originally Posted by mfirth
1940, are you 12 volt Or 6 positive earth ?
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For the 3rd time, STOCK. 6V system, positive ground. Original 39 Mercury engine....NO aluminum heads, NO high performance JUST STOCK. AND numbers sure help a fellow, I've got 3 different NKG numbers, 3212's seem to be the one (Thanks Bored&Stroked).....but NKG's web page only has to 1950 SO not sure if an 8BA plug is good for 39 Merc???? The "plug" cross reference page I looked at listed "several" NKG numbers 3212 being one and 3112 being one, not seeing where 7131 is listed for a flathead BUT That is what NAPA's web page shows for a 39 Mercury????