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Blake, a so called "Hot Coil" will not make the tractor crank (turn over) any easier. Supposedly (if the advertisements mean anything), its manufactured with better materials and insulations which makes it more efficient. HOWEVER, it will not fire at any higher "voltage" than the regular coil, as thats primarily a function of the plugs gap (distance) and the medium (fuel and compression) in which it fires. I still use them when I rebuild my mags though, since they arent all that much more expensive and are (hopefully at least) more efficient. If a coil has better magnetic materials and the wire is wound more dense (thin but good insulation) it can certainly improve the mutual magnetic coupling and transformer action and transfer more energy across (primary to secondary) while loosing less energy to heat, so it is possible for one coil to be better than another. If less energy is lost in the transfer (primary to secondary) it would be possible that a superior coil discharges more energy across the plugs gap, and even if it discharges at the same voltage as the cheaper coil (as explained above) it would be at slightly higher current to better ignite the fuel charge. Therefore (assuming the hot coil is actually more efficient) it might cause the tractor to start and run slightly better, regardless if enough better to be very noticeable. BOTOTM LINE assuming they are more efficient, it might help slightly in starting, cuz more energy (volts times amps) is discharged across the plugs gap when they fire. John T Nordhoff in Indiana
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