6V to 12 Volt conversion.

Question?
When performing a 6 volt to 12 volt conversion, do you have to change starter out when I go from a positive ground 6 volt to a negative ground 12 volt?
I have heard conflicting answers. Some say it will turn over backwards after conversion. :roll:

no, u don't need a new starter, and no, it won't turn over backwards.

gdbro4,Yes you can use the same starter and they only will turn one way .Positive ground or negitive ground makes no difference in rotation direction.

(quoted from post at 13:46:17 02/27/19) gdbro4,Yes you can use the same starter and they only will turn one way .Positive ground or negitive ground makes no difference in rotation direction.

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Thank you.

(quoted from post at 16:33:15 02/27/19) Question?
When performing a 6 volt to 12 volt conversion, do you have to change starter out when I go from a positive ground 6 volt to a negative ground 12 volt?
I have heard conflicting answers. Some say it will turn over backwards after conversion. :roll:

Click to expand...

You have now identified a population of people you don't want to go to for advice.

TOH

Sounds like you have been given one of the myths/false accusations made on these old Fords, maybe perpetuated by the yeller n' green guys ... ; > ). Starters don't care if 6V or 12V and certainly can't turn backwards by reversing polarity. I hate to assume but since you have posted on the N-Ford board, do we assume you have an N-Series tractor? If so, is it a front mount or an angle mount distributor? It does matter how the 12V switch out job is done on each. Realize that 99.98% of all electrical issues are due to incorrect wiring regardless if 6V or 12V and a healthy percentage of those are due to mucked up 12V conversion jobs. I suggest you go the NTC site and download a copy of "WIRING PICTOGRAMS BY JMOR" and find your setup and use it as a user guide to get it wired correctly. If you have a front mount it's important to keep the OEM Ballast Resistor in the circuit as wired. If you have a front mount and a 6V coil, you will also need to add an external ceramic 1-OHM resistor in addition to the ballast resistor. You can invest in a good 12V coil and eliminate the need for the extra external resistor - highly recommended - to also eliminate any extra wires and crap dangling around. I'm curious, and it's your tractor so you can do anything you want to it, but why are you switching to 12V? Is it running now? If not, perhaps there is something not wired right now. Simply having a 6V battery or a 12V battery does not designate the system is correctly wired up for one other. You can put a 12V battery on your correctly wired 6V system and it will run fine giving more gusto to the starter. There are other factors involved in switching over so be sure you do it right and don't skip or add any steps. having the essential original manuals will assist in knowing what you are supposed to have to begin with as well.

GET "JMOR'S WIRING PICTOGRAMS" HERE:
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Tim Daley(MI)