After mostly working out of the area for a year I went out to crank the F14. So it's been sitting for a year. No spark.
Here's what I've done.
Pulled the mag so I could check the points and all the obvious things. I've determined the coil, condenser, and all that stuff is good. I actually have another mag with a cracked case that I swapped all the parts around on and it all works fine on that one. Magnets are both good. Pretty much everything that can be swapped around I did.
The only obvious difference in the 2 is the snap of the impulse coupling. The mag with the cracked case is much tighter than the one off the tractor. The mag off the tractor is a rebuilt one that I bought a few years ago and the impulse coupling never was as hard to snap as over as the original. I always suspected that was because I had the spring turned 1 or more turns tighter than the rebuilt one. ??? I've pretty much ruled out the impulse coupling as the problem as the tractor has a starter on it and it actually will crank without the impulse coupling snapping if you stay on the switch and continuously crank the engine over. At the same time it started fine with the hand crank.
Since I've never had the mag completely apart I proceeded to disassemble the mag with the cracked case just to make sure how it came apart so that I didn't destroy the rebuilt mag in the process.
So here is the question.
Is it possible the rotor shaft is bad? I was sort of expecting to see rust on it, or even rust inside the case, but neither is true. It's all new and shiny looking. The mag with the cracked case however is rusty, but it seems to generate a nice spark.
The only thing I can figure is the tractor is mourning the loss of The Cowboys to the Eagles............