Glad to hear you are up and running again! Great job on the troubleshooting there.
Make sure the engine mounting bolts are tight too. They're notorious for loosening up all by themselves and that will affect the ground connection. :thThumbsUThanks for the answer about this working on my LT155 and what gauge wire. Will first start looking into the connections and the starter.
if u have just changed ur battery or have taken the wires off the terminals.. check to make sure u got the '-' post of battery grounded.. I read one post not to long ago.. the guy had the '+' post goin to the frame.. his starter was turnnin backwards ..Here is what I have learned thus far.
Discovered that my battery is less than ideal. Fixed that.
I can jump my starter with a wire but it just keeps turning and turning with no start.
JD has about 12 different wiring harnesses for the STX's.. they changed them a lotta times..The two main safeties that could cause a no start are the Transaxle neutral position switch and the PTO switch. The seat switch should not cause a no start as long as the PTO is off and the transaxle is in neutral. I searched the web and was unable to find I wiring diagram that I felt comfortable with, so hopefully Brad or a other member maybe able help more with a wiring diagram.