Re: Transducer Mount
Mount it inside just in front of where the transom and bottom meet as close to the keel as you can. That part of the boat is always in the water and the turbulence (bubbles) are less than one hanging off the transom and it is less prone to damage. BTDT numerous times as the outboard mounting method I started with, when they first came out always had a drawback. Get in calm water with it over the side just behind the transom. Take data. Put it in a zip lock bag half filled with water and set it where you think you can put it. Compare notes. If ok, mount it. Clean and rough up the area and the bottom of the ducer.....150 grit paper ok. Mount it with a hard epoxy. You are trying to transfer sound and a hard surface does much more efficiently than a soft one. I've run my boats 55 mph and still got good bottom readings, in spite of the turbulence at that speed.
Mark