Burnish the points by repeatedly drawing a clean strip of cardstock through them. When shined up, position crankshaft so points are "open" and clean off any debris with spray electrical contact cleaner and allow to air dry completely with the points still "open" before again checking for spark.
It's also POSSIBLE that there's no ground continuity from the "stationary point" through where it hinges from the mounting bracket, to the engine block.
Should be easy to check, ignition "on" points closed, with an unpowered test light, check for voltage at the movable point, the stationary point, and where it mounts to the block.
That will tell you where contact to ground is lost, for sure.
(BTW, I just checked online, and the DEERE dealer group I'm set up with doesn't stock them, order ONLY, hope you have better luck!)
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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