sounds like your seat switch is bad ! bypass it with a paper clip at the plug in and try it
nothing runs away like a deere! If it has tires, tracks, or propellers your goin to have problems .
cub cadet original,73,100,128,129,1320,1641,sears suburan 12 ,david bradley plow , craftsman three point tiller ,brinly hardley disk, 48 inch gannon earthcavator.