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Like Rob says... start with all good and tight connections. If your N starter system is still the original positive grnd setup, then your big thumb button on the tranny case is actually grounding that wire that runs to it. The solenoid is internally hot, as one side of the pull in coil is tied to the battery source cable. If you want to double check the big thumb switch, get on the tractor ( so you can run yourself over ) and take the wire loose from the thumb switch and manually apply it to ground... if the relay clicks and starter spins you've isolated a bad start switch. If not, again, try a jumper wire to the back post on the relay to ground, as the other wire may be open... If that doesn't make it click... may be bad solenoid. Try jumping around the solenoid with a good hefty piece of wire and try bumping the starter over that way.. ( be safe.. make sure tractor is out of gear... )... if the starter bumps over that way , then you've narrowed it down to the solenoid... A good trick is to try holding down the starter button, and having somebody give the starter a decent whack with a stick ( not a huge one to break something.. just incentive )... This usually tells you if something is stuck, if it works after wacking it... Let us know what you find.. Soundguy
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