Solved it..... But here's what I did first (after all the stuff in the first post)...
Put a voltmeter on the supply side of the coil. Ran the tractor until it did it's hiccup/quit thing. Stared at the voltmeter looking for a dropoff. Stayed at 12 volts the whole time. (Had a jumper wire ready to try to see if it might be a bad ignition switch, as suggested above). Finally told myself (for the eleventeenth time) that it is not electrical and went over to the fuel side again. The only thing I had not tried was rebuilding the carb (no kit in hand)... But I had already taken the Zenith apart and cleaned it thoroughly (without adjusting anything other than the idle mixture screw)... Looked up the float setting for a Zenith in my Allis Chalmers service manual (because I have none for a Farmall)... Set the float just a tick higher than it had been. Fired her up and went out with it. Ran the cultivator more than a mile with no problem at all. Am going to get a carb kit and install it for good measure. My supposition is a combination of a slightly low fuel bowl level coupled with the crummy gas we are being sold these days. Thanks for the ideas. I really was scratching my head, and that says a lot. Thanks all! Jeff
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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