Engine or starter stuck?
Agreed. If it was sitting in the field it might not have a good ground. You can always bypass the starter and see if that works but the Ohm meter is the way to go.Get your ohm meter and check for current to the starter and good ground. One bad electrical connection could be the cause of your problem and those to the starter and ground could be bad. If all of that is ok, pull the starter off, lay it on the ground, and connect it directly to a good battery. It should spin, freely and fast, if good. Remember to connect plus and negative cables with the correct polarity. That is where I would start. Also don't forget the connections from the switch.
It’s a 12 volt. I found a PDF wiring diagram and it looks like everything is correct. Just waiting out some inclement weather here and will head back out. I appreciate your advice.I have had no experience with that tractor. So I ask does it have a 6 or 12 electrical system. If 6 volt it should be positive to ground, near the starter, and negative from battery to the starter or solenoid. If a 12 v system negative to ground and positive to starter. Some pics might help us.