M 12v conversion

tcanthonyii · Jul 11, 2008

So I'm amassing my parts for the 12 volt conversion. In the conversion article it states to use a chrysler resistor on the coil. Would it be practicle to put on a 12 v coil instead? My 6v looks pretty beat up and thought while i've go the money going into it that a new one would be better in the long run.

thanks for the help.

T.C.

rustyfarmall · Jul 11, 2008

Get a 12 volt coil with the internal resistor.

rustyfarmall · Jul 11, 2008

Get a 12 volt coil with the internal resistor.

John T · Jul 11, 2008

On a 12 volt system, which coil set up is your choice. EITHER a 6 volt coil with an external series voltage reducing (12 to 6) ballast resistor ORRRRR a full true 12 volt coil (some folks refer to as internally ballasted) no external ballast required. It would be cheaper to just buy and add the ballast but if you need a new coil, prob cheapoer to just buy a 12 volt n be done with it.

John T

John T · Jul 11, 2008

On a 12 volt system, which coil set up is your choice. EITHER a 6 volt coil with an external series voltage reducing (12 to 6) ballast resistor ORRRRR a full true 12 volt coil (some folks refer to as internally ballasted) no external ballast required. It would be cheaper to just buy and add the ballast but if you need a new coil, prob cheapoer to just buy a 12 volt n be done with it.

John T

kossuth · Jul 11, 2008

Just get a new coil that has the resistor built in and be done with it. Less wiring you have to mess around with and one less thing to go wrong. You swapping in a alternator too or using a genny off something???

Allan in NE · Jul 11, 2008

I gotta tell ya,

The slickest conversion I've ever seen is this old M I bought up by the North Dakota line.

The fella took a 12v generator/regulator off of a 560 and bolted it right up. A direct bolt on.

Heck with that silly "resistor" and used the original 6v coil. Darned thing runs just fine and so far, I can't see a bit of pitting at the points.

Allan

Allan in NE · Jul 11, 2008

I gotta tell ya,

The slickest conversion I've ever seen is this old M I bought up by the North Dakota line.

The fella took a 12v generator/regulator off of a 560 and bolted it right up. A direct bolt on.

Heck with that silly "resistor" and used the original 6v coil. Darned thing runs just fine and so far, I can't see a bit of pitting at the points.

Allan

Hayfarmer · Jul 11, 2008

I picked up a neat inline diode at my NAPA dealership for the feed wire, much easier than the resister and diode I put on my prior conversion. Also I agree, go with the 12 volt coil, it will pay in the long run as the resisters go out eventually.

tcanthonyii · Jul 11, 2008

Sweet! That's what I wanted to do. Less wiring and it's just cleaner. A coil is only 20 bucks so why not.

I ams running an alternator. My buddy gave me one off of an older chevy pickup. Should see if he has a coil too!

I need to get this done sometime soon as i'm borrowing a battery and the stupid tractor won't charge. I need to look at the wiring, it's a little cobbled but I think the generator is just bad. I have a 6v battery that holds a charge but dont' think it works well under load. Gonna get it load tested this weekend. Plus on top of that some bone head put a 12v cable on for the + ground. I'm pretty young so I could see someone my age who never worked on 6v before doing that but it was done by an older gentleman who should know better!

Thanks a ton for confirming my suspicions.

T.C.

M 12v conversion

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