shoot thru hull transducer

S

Skiporkins

New member
I am looking to install a shoot thru hull transducer on my toland 18.8. I think I’ve got a good idea of what is required but I would like to confirm my hull construction before moving forward. Can anyone help me find out if I’ve got a balsa, foam or the least likely, solid glass hull on the bottom of this boat? Any help or any pointers on where to look this info up would be amazing. Thanks in advance.
 
The answer is in the archives.

The deck and bottom contain encapsulated core.
Click to expand...

I would drill a pilot hole before taking the area needed for the transducer. Often it is wise to put the transducer in a baggie of water in the area where core was removed to see how well it transmits.

Conventional wisdom would build the inner skin back to the same thickness as originally over the core, (on the bottom and up the beveled sides.).

Although some say to use epoxy to give a conductive media, I prefer to make a plywood box covered inside and outside with epoxy and glass, then fill the box (which has a lid with a threaded filler tube and plug with mineral oil. Another option is to use silicone.
 
I appreciate the info and the tips. I like the mineral oil idea. I’m going to try one more adjustment with my skimmer but I’ve been fighting with consistent readings and I seem to lose my depth just when I need it the most.
 
Journey On had had 2-3 different transducers off the stern. Every one has worked well, fast or slow. So, why is your transducer giving trouble? Certainly I don't know, but could it be that the transducer is not mounted rigidly to the stern? I used a piece of starboard attached to the hull and hung the transducer(s) from that.

As others with a C-Dory, I've had sailboats and those had a through hull transducer and I feel it would be a major hole in the hull to install one. Also, your selection of transducers is limited.

Bob does give a good method of using a through hull without drilling.

Boris
 
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