Re: Installing my new Hummingbird 1000
In general, mounting the transducer on the outside of the transom should give better sensitivity as the signals will not have to bounce through the fiberglass. However, an inside installation is still preferred by many in order to avoid making holes in the hull, and the loss of sensitivity may not be noticable.<br /><br />Here's one way to find out if a through-hull installation will work for you:<br /><br />Place the transducer in a small transparent plastic bag, fill it with water and tape it shut around the transducer cable. Place the bag on the hull bottom where you think it should go, try to place the transducer inside fairly level and fix it in this position with more tape. Take the boat for a ride and see if it works ok. If it doesn't, move it around until you find a position that works.<br /><br />To install the transducer permanently in that position, build a level platform of epoxy filler, let it dry, add more epoxy and stick the transducer in it to glue it in place. Fix it in place with tape while the epoxy dries.<br /><br />I have done it both ways (inside a wooden hull, and outside a fiberglass one). Both will work well if you do it properly. In the end, it's a matter of preference and of fit to your particular hull.
