Join Date: May 2016
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If you only have one solenoid spade hooked to a wire, that wire should show 12 volts at that spade when the key is turned all the way to start. If not, it's either the wrong wire or a safety is not in correct spot (PTO is on, tractor in gear, brake not depressed) If the other spade on the solenoid has nothing hooked to it, clip the black wire female connector to it, and attach the loop under one of the mounting bolts and try it.
Assuming you've pulled the fuse out of the holder on the right side of your picture to see if it's OK. It may have blown when you were trying to jump it.
If you still get nothing, I'd unplug the connector behind your ignition switch and check for corrosion or burn marks. If you get another click, but NO crank, turn the key off and turn the engine over clockwise with your hand past the compression bump and try the key starting procedure again.