Farmall AV

C Fitz · Sep 8, 2018

Got a 1944 AV, has a magneto, 12volt generator but can't tell what voltage starter is on it. Is it alright to put a 12v battery on it just to start it?
Got to crank start it now. And is it a negative ground system? It had a on/off switch that grounds the mag

Bob · Sep 8, 2018

Originally, it was a (+) ground, 6 Volt system.

MOST 12 Volt conversions are (-) ground, but some guys kept 'em (+) ground after conversion.

Polarize generator BEFORE startup to whichever polarity you decide to go with.

MAY 12 Volt conversions retain the 6 Volt starter, in typical use, there's no harm to the electrical parts of the starter, but they DO engage with more of a "snap" on 12 Volts, and that can sometimes shorten starter drive life.

Some guys have suggested using a long run (looped out of the way) of light-gauge battery cable to help soften starter engagement a bit.

gene bender · Sep 8, 2018

It is neg ground because of the regulator so if it charges leave it as it is. Your regulator will not like pos ground as they are very sensitive

Farmall AV

C Fitz

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Bob

Well-known Member

gene bender

Well-known Member

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