I just had someone replace the right side coil and plug wire. When I picked up the tractor I decided to engage the deck. It would pull in the electric clutch but it wouldn't stay engaged. The toggle wouldn't remain up. The mechanic said that he never messed with the switch so I brought it home and replaced the toggle switch myself. It cost me $42 to learn that the switch isn't the problem. The seat switch was bypassed years before I bought the tractor. The neutral switch had been moved out of the way so it was always happy. The engine starts and runs fine. The failure of the PTO switch is the only problem. This tractor was new in 1993. Any ideas? Thanks