You don't need to make any holes
Brad, I used to have a Standard DS50 on a boat similar to yours. I found out that Standard has 3 types of transducers. One that is an external transom mount, another that requires a hole in the hull, and the third that is specially designed to shoot the pulse 'through' the hull (looks like a small hockey puck). That's the one I got. It should be installed as far forward, infront of the keel. Find a spot that you can get inside the hull to mount it directly to the fiberglass. You may need to cut an inspection hole inside a locker or something (I drilled a 6" access hole to get my arm in). You then epoxy it to the hull with a glob of marine tex (make sure there are no air bubbles). I've heard some people use silicone, but silicone will 'dampen' the electronic pulse. Marine tex creates a solid structure with the fiberglass so the pulse isn't interfered.' Hope this helps. Roc
