Thermostart use - starter stops working

[Winmac]

The engine should not crank over while in the thermostart position, only when the key is moved to start should it crank over.

Some older tractors had a heat + start position but its unlikely yours dose.

 

[TennFire]

Used a test light today and probed the switch and wiring. Thermostart tab lights in the 3rd, spring loaded, setting but not the starter (which is as it should be it appears). Starter powers in the 4th setting only. Still, if the thermostart is engaged for 30+ seconds, the starter makes no sound unless the key is turned off and left off for about 2-3 minutes.

 

[Winmac]

If you had not already replaced the switch that would be my first move, next I would check if the switch supply is loosing power or just the starter terminal. Also take a look at the wiring diagram see if there are any circuit breakers in the system.

Without looking at myself I may not be much more help.

 

[Soundguy]

Agree, make sure the feed wire to the switch is not heating and loosing power after thermal aid.

 

[irvingj]

So I've been following this thread for a while, but still did not know exactly what a "thermostart" was… then I found this youtube video: https://www.youtube.com/watch?v=Wi4mV8nrfz4

Now I know! Very clever device, which looks like it should sure help to start a cold diesel, assuming it works. (Only thing I had been familiar with was glow plugs.)

Good luck, TennFire, and I'll be following the thread to see how you do.

Learn sumpin' new ev'ry day! I love this forum!