I just bought a 1997 grasshopper 725K. The previous owner had the motor rebuilt and said that it had started running on one cylinder. When I got to pick it up it started up and has been running great. Problem is when I turn the key position to "off" the mower doesn't turn off. You can hear a change in the sound of the engine, but it doesn't actually kill the mower. Any suggestions would be very much appreciated. Not sure of HP but it is a kohler motor. It does have a new ignition switch on it and i also took one off a different grasshopper i have and it didn't change anything.
