If I was guessing on that other tractor I bet it's a safety switch that's keeping it from starting. I have had very good luck with my Kubotas. I have 2 right now, my 2nd and forth. My dad bought me a used B 7100 when I was a kid and I used that tractor for everything. I kept it for 16 yrs and when I traded it in on my L 3000 it had over 6000 hrs on it and still running fine. I bought a M 9000 in 02 and traded it in on a M 9000 cab model in 04. I would like to have another one in the 50 to 70 hp range. Good luck with your bota.