If you have an IGN post on your starter solenoid - sounds like it is being used as a resistor bypass when the engine is cranking. Nothing wrong with that. But when not cranking - power to the coil primary comes from the ignition switch. An external resistor will be in that circuit somewhere.
If you have used coils in your shop -you can determine if they need external resistors by checking resistance across the primaries. If 1 to 1.5 ohms - it needs a resistor if used with a 12 volt system. If high - around 2-4 ohms - NO external resistor is used.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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