Replacement coil - for a Farmall Super MTA

Anonymous-0 · Jul 16, 2008

I need some help please. My stepdad is in the hospital recovering from a heart attack he had last Saturday evening. We both belong to a tractor club that has a show comming up. He has a Farmall Super MTA, that someone stole the coil off of. The tractor is working on a 12 volt, negitive ground system. I bought replacement coil at napa, but when I got home I found out it is 3ohms. Since the coil is an electrical item napa will not exchange it. Can I use the 3 ohm coil and do away with the resistor he has in the system? I think that the hot wire from the switch runs to the + side of the coil, and the - side of the coil supplys juice to the points, BUT I am not 100% sure. Without dads knowing I would like to get the tractor running and take it and him to the upcomming show. My mom thinks it would make him very pleased if I do this for him.

Thanks in advance for any assistance with this problem.

Dblair · Jul 16, 2008

that's the only one for a four cylinder . 3 ohm doesn't need a resistor.

Bob M · Jul 16, 2008

Keith - With that 3 ohm coil you don't need the ballast resistor! (A coil requiring ballast for 12 volts will show a primary resistance of about 1.6 ohms or so.)

Assuming your tractor is now negative ground, the supply from the ign switch should go to the coil +. The coil - terminal goes to the points terminal on the distributor.

Good luck to you and your stepdad!

Anonymous-0 · Jul 16, 2008

Thank you both for the help. I will post back tomorrow and let you guys know if I get it running alright.

Replacement coil - for a Farmall Super MTA

Anonymous-0

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Dblair

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Bob M

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Anonymous-0

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