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Farmall H M Starter Switches

A

Anonymous-0

Well-known Member
My H was always a reliable starting tractor until a few years ago when someone stole the original starter switch. I installed a new switch labeled for H & M applications. Then the tractor was slow cranking and the switch got hot. A friend cranked on his tractor too much and burned up the switch. Today I helped a gentleman with a tractor problem and noticed he had a new switch. When it didn't start right off, the switch got hot. Conclusion is the new switches can't carry the load.

Maybe the person that stole mine wasn't so dumb knowing it was a better switch than a new one.

Now, for the question. Does anyone know a source for for a GOOD quality starter switch that can carry the load without getting too hot to touch? I can't say for sure, but I believe my old switch had 3/8" studs. All the new ones I see are 5/16" studs.
K-Mo
 
I replaced my H switch with a Rural King unit. The original (and I think it was THE original) was getting to the point it would crank slow. There was no heat on the outside of the shell, but the contacts inside were pitted and corroded. If you have heat involved, it means there is resistance. This could be as simple as a loose or bad connection on the cable or an internal problem.
 
I am going to mount a ford type solenoid on mine and reduce the current through the switch. Mine gets hot when it cranks hard on cold days.
 
I work on my friends H"s and M"s, his starter switches only seem to last a year. I was getting them from O Reilly's. Is there a better place? Dave.
 
I think the replacement switches are only rated at 100 amps. They need to be about 500 amps to handle the six volt starter draw.
 
I have had good luck with genuine Delco switch.
If they still make them. Been awhile since I needed one.
 

They are all pretty much junk anymore. I have put 3 new ones on from TS. Imports you know..........
 
Did you ever try to go through a starter rebuilder that can go Delco direct. Had to do that to get parts for starter on a Cockshutt golden eagle PD-40.
 
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