Re: Transducer mounting boards ?
I do not know what type hull you have, Wood, Fiberglass, Aluminum but there are many ways to mount it. In my case I have two transducer mounted one very large 200 Khz 8 degree transducer and one small 200 Khz 20 degree transducer and I only drilled one hole.
My hull is Aluminum and the small transducer is stuck on with Silcone seal. Been on there since 1981 with no problems. The large 8 degree transducer and the paddel wheel I did drill one hole but if I did it again I would not drill any. What I did was make a bracket where I could use the screw from the pitot tube to hold one side of the transducer. The other side I did drill and that screw holds both the transducer and the paddle wheel. All the transducer and the paddle wheel I put silicone seal under them first and it has held the entire time.
Here are two types of transducer mounts. I know Iboats also sells them but could not fine with the searches I tried. I know many use starboard like this but it is hard to work with I prefer aluminum.
http://www.cabelas.com/cabelas/en/t...h/search-box.jsp.form1&_dyncharset=ISO-8859-1
If I was to do mine again I would get a small block of aluminum about 1/4 to 3/8 thick and 4 to 6 inches square. I would position on the transom of the boat and mark to drill two transducer mounting holes I would then thread and mount the transducer to the aluminum. Then turn over and make sure the screw does not stick out the back side. Then I would use silicone glue and glue that block to the boat. Both mine right now will hold with just the silcone glue on the back side of the mounting bracket. A flat square of aluminum would hold forever. The good thing is you can remove with a screw driver as a pry bar with no damage. I did that to mine when I added the second transducer. I moved the Smaller one to the engine side of the pitot tube to make room for the bigger transducer and the Paddle wheel.
One thing you should do if you do like me and just glue with silicone glue is add a tie wrapp to cable as close to the transducer as you can. This is just in case the transducer hit a log or something and breaks loose. The Tie wrapp will stop the transducer from swinging on the cable and ending up hitting someone in the back of the boat.
With my setup I have hit loggs or sticks and the transducer kicked up in it bracket but the bracket staied solid to the hull so all I had to do was loosen the mounting bolt and fold it back down and tighten the bolt.
I do not know if it would work the same on Fiberglass or Wood but Silicone works good on aluminum. 4200 would hold even better but be harder to remove to reposition and 5200 would probably do damage if you tried to remove.
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