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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Today's Featured Article - Tractor Traction - by Chris Pratt. Our first bout with traction problems came when cultivatin with our Massey-Harris Pony. Up till then, this tractor had been running a corn grinder and pulling a trailer. It had new unfilled rear tires and no wheel weights. The garden was already sprouting when we hooked up the mid-mount shovel cultivators to the Pony. The seed bed was soft enough that the rear end would spin and slowly work its way to the downhill side of the gardens slight incline. From this, we learned our lesson sinc
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