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12 volt coils

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Mike F

04-22-2003 10:50:36




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I put a 12 volt coil on my 60 and it works good, it has the internal resistor, is this ok or is it running on borrowed time, starts great, any feedback on this? thanks Mike




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John T

04-22-2003 12:04:50




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 Re: 12 volt coils in reply to Mike F, 04-22-2003 10:50:36  
Afternoon Mike, if you scroll down a few days, you will see several of us had a good long deep discussion on the subject of coils and polarity etc etc. We all enjoyed it, although it may have bored some of the guys. Anyway, as clooney mentioned, on that 12 volt tractor you have which apparently has no external ballast resistor, a 12 volt coil was the right way to go. Not being sure where in the circuits its internal ballast is located, as long as she runs good you are probably fine on polarity. We all agreed pretty much in last weeks discussion you dont want the ballast resistor between the coil and condensor, and if you have a negative ground auto type coil, it should probably be wired - to the distributor. Reverse it and see how she starts and run if you like, you may or may not notice much difference????

God Bless the USA John T Nordhoff in Indiana

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Clooney

04-22-2003 11:09:59




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 Re: 12 volt coils in reply to Mike F, 04-22-2003 10:50:36  
Mike, it sounds like you did right. Most 60's didn't come from the factory with an external ballast resistor. Yours apparently doesn't have the external resistor or it probably wouldn't run very good with that internal resistor coil. ~If you want to be sure just put a volt meter on the coil's ignition switch side terminal & see if you have around 12 volts while running. If so, you are good to go.
~If it's an auto parts store coil & your tractor is still factory positive ground you should probably wire it with the negative coil terminal towards the distributor. If by chance it's an original Deere positive ground coil it should be wired with the positive coil terminal towards the distributor. If it runs good as is it probably won’t make any difference….

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