Starboard block for D S transducer and Cable Clam for cable

ferret30":3uta6ecf said:
I'd consider trying an adhesive only (no screws) approach to holding the block.
Click to expand...

I've just cut a Starboard™ block for my transom (removed the transducers, which were directly transom mounted, and will be repairing the disused holes before re-mounting them on the Starboard™ block) and I plan to mount it with four Weld Mount studs (they use methacrylate adhesive). I don't think the forces involved will overwhelm the gelcoat - at least I think I have a reasonable enough chance of success that I'm going to try it that way (of course one could also remove the gelcoat down to the glass if they wanted to).

Another option, perhaps.

Sunbeam :hot
 
Excellent topic, photographs and descriptions of project. I am in the process of doing my own starboard transducer mounting block. I have two pieces of 1/2 inch thick which I want to bond together for a 1 inch thick starboard. Bob, it looks like you bonded two pieces together. What did you use for adhesive? Did you undercut both sides? Does one have to reapply gelcoat to areas of the hull exterior not covered by a starboard replacement like this in order to maintain a water barrier?
Thanks,
Grazer
 
Grazer":1mmqn7wb said:
Excellent topic, photographs and descriptions of project. I am in the process of doing my own starboard transducer mounting block. I have two pieces of 1/2 inch thick which I want to bond together for a 1 inch thick starboard. Bob, it looks like you bonded two pieces together. What did you use for adhesive? Did you undercut both sides? Does one have to reapply gelcoat to areas of the hull exterior not covered by a starboard replacement like this in order to maintain a water barrier?
Thanks,
Grazer
Click to expand...
It's very difficult to get a good "bond" between two pieces of starboard although there are some special adhesives for starboard that might work. However, simply screwing through two pieces is adequate for the purpose. As for reapplying gelcoat... I'm not sure to what area you are referring. If, you're talking about holes that you have re-filled with epoxy, depending on what kind of epoxy you have used, there's generally no need (other than cosmetic) to gel coat over the top of that.
 
Agree with Roger, yes, I have used two pieces of 1/2" starboard. Just screwing thru them is adequate. The hole which the screw goes into has been potted with epoxy, thus no possible leakage into the hull. Undercut the layer of Starboard which is next to the hull, to get reasonable adhesion of the 5200 or similar adhesive/caulk.
 
This may not apply, but just know that epoxy will deteriorate if exposed to UV (sunlight), so in that case you might want to gelcoat or paint over it (I realize you may not end up with any exposed to light in this case).
 
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