When you say you moved the plug wires one space and it still run to me says you have a timing issue. That tells me the rotor in the cap is pointing nearly half way between the spark terminals to the plug wire towers of the distributor cap. I would guess that it is way advanced. Another thing that might explain why it runs okay for 10 - 15 minutes may be a sticking centrifugal advance, but is some how loosening up when the engine warms up. This allows additional advance to cause it to run poorly. I’m surprised you are not getting spark detonation when this happens but those old tractors have a really low compression ratio. Just my theory.
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Today's Featured Article - Box Plow Blues - by Tom Schwarz. One of the first implements most tractor owners obtain is the box plow. For very little money, this piece of equipment promises to plow and flatten any hill or vale on your ranch road or farm. At least that's what I thought! As simple as a box plow appears, it can be rather challenging to make work correctly. In our sandy soils of Florida, traction is king. You can never have wide enough tires or heavy enough weights to get all the traction you want … unless you own a monster tractor. U
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