On a 12 volt tractor YES you can EITHER use a full true 12 volt coil (NO Ballast required) or else a 6 volt coil with a voltage reducing (12 to 6) external series Ballast Resistor. A full true 12 volt coil dont require any ballast on a 12 volt system and has a priamry resistance in the neighborhood of 2.5 to 3.5 or so ohms. Theres nothing else required in the ignition priamry system wiring if its a 12 volt coil on a 12 volt system.
Yous sure the voltage reducing ballast resistor was wired correct in series with the coil after the switch and ahead of the coil??? If it were a good ballast (ohms around 1.5 to 2) and was wired correct it should have reduced the current and voltage on a 6 volt coil so it will work and not burn up???
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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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