A true 12V coil will have a 3 ohm primary winding. a 12V with external resistor coil will Have a 1.5 ohm primary winding hooked in series with a 1.5 ohm external resistor to end up with the same 3 ohms total resistance. The advantage of the coil that uses an external resistor, is that you can wire it to bypass the external resistor to make extra hot spark for starting, then having the resistor back in line for running to give long point life. This was pretty much standard equipment on all automotive 12V point type ignition systems.
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Today's Featured Article - Storing Your Tractor - by Staff. If your tractor is going to be stored for any length of time, a few precautionary measures are helpful in preserving various parts, also in avoiding future difficulty. Store tractor under cover. If impossible to place tractor under cover, be sure to cover air stack and exhaust pipe. Drain radiator and engine block. To avoid gum content collections, drain both fuel tanks and carburetor. Leave radiator and fuel caps slightly loose to protect gaskets. Block tractor up to remove weight from tires and to keep tires from contact with moist floor.
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