Deep woods, what is your seat switch doing? I have had troubles with seat switches on both my tractors, I guess they are set up for people weighing 200 lbs. In the case of my B2650 HSDC they even replaced it under warranty. Still acts up especially in cold weather. I was considering defeating it, but after tech put snowblower on today, I went back to tucking padding under the velcro'd pad that holds the sensor. I get tired, cold, and hungry snowblowing, and it would be too easy to forget, hop out to open or close a gate in the dark, and slip and fall on the pto shaft.I'm going to take this thread slightly off topic, but it is related to spinning pto shafts. My B2650HSDC has a bad seat switch that would have to be taken back to the dealer to have it diagnosed to be replaced under warranty. I have no way to get my tractor back to the dealer to have this done, so I have disconnected the seat switch to enable it to not shut down due to a bad switch. Since I put my snowblower on I have been trying to figure out how I can make my tractor safe again with having it shut down if I get off the seat. I would think that I would be smart enough to shut off the pto before getting out of the tractor, but with all of the above comments I need to be sure it can not happen to me.
I know what I am about to do would not be approved by Kubota, but I know it will keep my tractor running with a disconnected seat switch, but shut it down if the pto shaft is spinning and I get out of the tractor. My plan is to install a magnetic switch on the door of the cab, using the seat switch circuit, so if I open the door with the pto running, it will open the circuit for the seat switch and shut down the tractor. This solution will only work on a cab tractor, but I can see no down side to my solution to making my tractor safe again having the pto engaged. Kubota, if you are reading this, you can use my solution to fix your bad seat switch design. I have heard many comments on this forum regarding bad seat swiches, so it is an ongoing problem. I won't even charge you for using my idea.
Various shaped pads placed over or under the pad in the middle of the seat might solve your problem. I have cardboard on the L tractor and cardboard and a piece of styrofoam on the B 2650.