Kubota B1700 odd starting problem

[JustAGuy]

Good day everyone,

I have a Kubota B1700 with an unusual starting issue. When the tractor is cold, it (usually) starts up fine with no problems. But after I have been running it a while, when I turn the key, the ignition lights come on but no engagement of the starter. No clicking and the engine does not turn over at all. It rarely does this when it is cold, but almost always does it after it is warm. When it refuses to start, I am able to turn the key on and start it with a screwdriver by jumping it at the starter. Any thoughts on what the problem might be?

Thanks in advance!

 

[jimmysisson]

Defective battery cables, corroded cable connections at ground, starter or battery, failing battery, fried key switch, failing connector at solenoid wire at starter, failing solenoid. Try to remedy one thing at a time so you'll know (and tell the rest of us) what was wrong. Sounds like a simple process of elimination.
Jim