Humminbird XTM-9-20T Trolling Motor Transducer [710160-1]Trolling Motor Transducer Trolling Motor Mount Transducers are designed to mount on to the body of most trolling motors. A low profile shape reduces drag in the water and minimizes interference with weeds. Trolling Motor Transducers are often used in conjunction with the standard Transom Mount Transducer and connected by a switch to allow the fishfinder to display information from either the transom or the trolling motor. Some Transom Mount