Posted by David Bean on November 09, 2009 at 20:39:49 from (72.148.194.169):
New tractor owner (old tractor). Best I can determine I have a 1950 8N with side mount and 12 volt conversion with alternator.
When I picked it up it didn't miss, but did when I got it home. So I suspected spark first. It has improved with cleaning and regaping points and new plugs. Wiring was iffy, with electric tape splices. So I dedided to clean and repair and also improve the ign system. Installed the EI and 3 ohm flamethrower coil. As I move through the wiring repairs I have a couple of questions.
The EI works well and the tractor cranks and runs much better than before. I notice that the "square" resister is in the circuit. Looking at the EI instructions I can see how folks become confused. First says to leave in the resister if it is presently in the circuit. Reading on you find that the chart suggests no resister if you have a 3 ohm coil. So the initial instruction to leave it must assume you are leaving in the old coil. But with a 3 ohm coil (flamethrower) I should have resistance built in the coil. So, is there any advantage in the external resister also being in the circuit? I'm thinking not.
Secondly, I note that the alternator has only one wire from the BAT post to the battery. Seems to me that without the feedback circuit wired that the alternator is being used as not much more than a glorified generator. Is that correct?
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