If the plugs aren't getting wet when flooded, may be a small intake leak.
If pull starting doesn't work I would check the manifold gaskets.
I had a 36 F20 that would get "can-tank-erous" on starting, but only if there were people watching me crank it, everyone would finally walk away, and it would start on the first pull.
I would get it flooded ( very easy to do) pull it a few feet, pop the clutch and it would start & run like a watch.
I agree it sounds like a weakening coil in the mag. The point gap is tricky to get set right. File your points to perfectly flat on base side and just a bit of roundness on the top, install them & use magnification and get them to where they just touch in the very center. An old trick I learned from a senior mechanic.
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Today's Featured Article - Madison's County - by Anthony West. Philip Madison has been a good friend of mine for quite some time. He has patiently suffered my incessant chit chat on the subject of tractors for longer than I care to remember, and on many occasions he has put himself out, dropped what ever it was he was doing, to come and lend a hand cranking handles, or loading a find onto a trailer. Although he himself has never actually owned or restored a tractor, he was always enthusiastic and always around helping with other peoples projects.
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