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Ford 9N, 2N & 8N Discussion Forum

Autolite 437

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Dell (WA)

03-07-2006 00:04:17

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Bill..... ...yes, the OHV NAA engine was designed to use the same Champion H-10 sparkies just like the flathead 8N engine. Modern no-lead gasoline seems to require a HOTTER sparkie such as the Champion H-12 to keep from fouling. Howsomevers: most find that the AutoLite AL-437 equivalant of the H-12 to be a "better" sparkie. Gap = 0.025.

Both Ford and Marvel/Schebler say to set both the side-pointing idlemix and the down-pointing mainjet to 1-turn to start with. I adjust the down-pointing mainjet to 1-1/2 turns and LEAVITT!!

I then adjust the side-pointing idlemixx for maximum idle speed, not smoothest runing, max idle speed. Understand? Remember the idlespeed is bassackwards, out for lean, IN for ENRICH. My idlemix usually ends up about 3/8-turn. Yours will be different..... ....respectfully, Dell

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