At cranking speed a good mag should produce a spark that jumps about 1/2".
Make sure that your plug wires are good and rig up a fixture to hold one or more at 3/8" or so from ground and watch it while you or someone push the crank slowly until you hear the impulse snap.
Note: The impulse should SNAP, not just click. I have seem mags in which the tar in the windings has flowed into the mechanism causing the mag to turn hard. The tractor will still run and sometimes crank start with difficulty but impulse operation is poor resulting in hard starting.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that’s wha
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