If you go to (-) ground (with the appropriate alternator and EI unit) for the most effective spark, connect the power wire from the ignition switch to the (+) terminal on the ignition coil.
If going to EI (likely Pertronix) be sure to use a coil with the appropriate primary resistance OR add a ballast resistor as needed.
Follow EI manufacturer's instructions as to what the minimum primary resistance their unit will tolerate.
LOW coil primary resistance GENERALLY = HOTTER spark AND more primary current and (HEATING) of the EI unit and there are limits of what they will tolerate.
Be especially careful not to leave the ignition switch on without the engine running or you may let all the smoke out of the EI unit and possibly the coil.
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Today's Featured Article - Product Review: Lead Substitutes - by Mike Schordine. Lead was oriinally added to gasoline as an upper cylinder lubricant. It lubes the valves and seats. If you rebuild the motor, you could use hardened seats and valves, and unleaded fuel. But if your old tractor runs good, a simple lead substitute added to the gas is a perfectly reasonable solution. And, if you are like me, your tractor is under cover, but it sits outside. So with every temperature change, the humidity in the air collects in the fuel tank, in the form of water.
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