Your engine won't crank. There is a minimum of 3 safety switches that could cause the problem and any one of them not completing the circuit will cause a no crank situation. Clutch, seat and PTO. The PTO engages the blades. They all must have continuity from one to the other and through the start circuit of the ignition switch in order to provide current to the starter solenoid.
Where is the safety switch for the Clutch?Your engine won't crank. There is a minimum of 3 safety switches that could cause the problem and any one of them not completing the circuit will cause a no crank situation. Clutch, seat and PTO. The PTO engages the blades. They all must have continuity from one to the other and through the start circuit of the ignition switch in order to provide current to the starter solenoid.
Not certain on the 105 but usually if you look under the tractor and watch the mechanical(s) move while operating the clutch / brake you will see something pushing a plastic plunger in and allowing it out when B/C is released. That plastic stationary switch will have wires attached so look for wiring.Where is the safety switch for the Clutch?