GPSMAP 400/500 Series Installation Instructions - Garmin

To mount the transducer on a transom: 1. Position the transducer mount at the selected transom location. Make sure the transducer is parallel with the water line. Mark the center locations of each hole on the transducer mount. Apply marine sealant to all screw threads to prevent water from seeping into the transom. Mount the transducer

  Transducer, Transom