Andrew, a little logical thinking will get you out of this...
The only reason the distributor makes any difference is because the ignition switch is then used to perform double duty as the alternator excitation switch.
You can't do that with a magneto switch because it works differently. It grounds out the magneto, whereas the distributor ignition switch connects the battery to the coil.
Sooooo, you need some way to get excitation current to the alternator. On a distributor tractor, that's done with a switch, and you don't have a switch. You need to add a switch.
Run a wire from the + on the battery, to a new push-pull switch that you mount somewhere on the platform (maybe an old ignition switch or reproduction so it looks like it should be there), then to a diode or LED, then to the alternator.
This post was edited by mkirsch at 10:55:25 06/10/08.
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