I have a super Z with a 25hp kaw on it. When i try to start the motor it will not turn on, the red light comes on the hydro fan turns on but nothing. Before today this would happen and i would jiggle the pto switch and it would turn over so i replaced that and the mower will not turn over sometimes still so i know its not the pto switch. This afternoon i tried and tried but it would not turn over after it ran just a half hour before. Does anyone have any ideas? I'm thinking key switch.