3InstallationMounting the TransducerIn-Hull InstallationTo avoid drilling a hole to mount a thru-hull transducer, a transommount transducer may be used with epoxy inside a boat (also called “shoot-thru-hull” installation). For a transducer to be mounted inside the hull(shoot-thru, not thru-hull), the boat must be fiberglass, no core (contactyour boat manufacturer if you are unsure). Test by placing a small amountof water inside the hull, placing the transducer on top of the water, thenverifying the accuracy of the locators versus the current water depth. Ifthey are the same, use epoxy (non-silicone based) to affix the transducerto the inside of the hull. If using a temperature sensing transducer, thetemperature displayed will reflect the hull temperature.Selecting a LocationThe location has to be solid fiberglass, devoid of any air bubbles,laminates, fi llers or dead air space. The location needs to be in anarea of clean water at all speeds. Do not place the transducer overany strakes or behind any obstruction on the hull that would createturbulence.Testing the LocationPlace the transducer in the water, pointed directly at the bottom, andset the unit for optimum performance. Place the transducer in the testdevice as show on the side bar. If the sonar performance is significantlydegraded, another location will need to be tested.Continued on page 4Testing the LocationMany modern hulls have a pre-located pocket forIn-hull transducer installation. If you are unsureif your hull is equipped with a prelocated pocket,contact your hull manufacturer.PVC Pipeor a CanStrip Caulk orRTV SealerHull SurfaceWeighttransducer tohold it in placeFill Pipe or Canwith water or alight mineral oilwww.reelschematic.comwww.reelschematic.com