My mower on my 425 kept disengaging on its own and I would have to push the PTO switch off and on to get it going again. It also started not disengaging when I went in reverse. Finally I stopped the tractor and once I did it didn't start again. The dash lights came on but nothing. So I replaced the PTO switch, disabled the Brake switch (gray push button attached to the frame) and still nothing. I also replaced the key ignition module. Still the tractor wouldn't start. Finally I checked the battery terminals again and found part of the problem. After making a better connection the tractor now starts BUT the PTO will not engage. FYI - The PTO lights on the dash do not come on.
Any help would be appreciated! I just got it back after 3 weeks at the shop for a hydraulic problem and They can't get to this in less then 2 weeks!!