Was mowing along and quickly pulled back on the controls to avoid running over a stump. From that point on the control levers (will call them that since dont know real name) did nothing as engine continued to run. Moved them forward and backward and nothing. Shut off engine and inspected. Engine would not start again. Finally saw that the belt driving the hydro gears was off and the cross member connecting the hydro gears was broken. Jacked up the mower and undid the tension spring, put belt back on correctly and reattached tension spring. Knowing broken cross member still needs replacing I hoped mower would start to drive it back to my shop. Engine still wouldn't. Sitting in seat and Control levers are in start (spread wide into slots) position. Quite sure nothing wrong with engine or electrical. Its as if the control levers not spread wide into start position but they are. I see the buttons that are pressed in when the control levers are spread. It looks like the control levers only push them in half way but I can finger push them in farther. Not sure that makes a difference. Hoping somebody has a simple answer. Thanks