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Author Topic:   Underwater Sealant
66Sakonnet posted 06-21-2001 11:45 PM ET (US)   Profile for 66Sakonnet   Send Email to 66Sakonnet  
I have to fit a new transducer for a new sonar unit on my whaler, I don't have a trailer available, nor a lift... I'm faced with installing the transducer underwater, I'm concerned with sealing the holes I must drill, does anyone know of a good underwater sealant that would do the job, or should I beach her and use some highlift jacks to elevate the transom>>>


jimh posted 06-22-2001 09:05 AM ET (US)     Profile for jimh  Send Email to jimh     
I would recommend undertaking the install on land! If you drilled holes in the transom below the waterline they would immediately let in water. Then, when you installed the transducer and sealed them, the water would be trapped. That can't be good for the wood.

triblet posted 06-22-2001 10:30 AM ET (US)     Profile for triblet  Send Email to triblet     
Know anybody with the same boat on a trailer?

Failing that, I'd make the boat as light as
possible, get a couple of truck innertubes
and tie them under the stern, and inflate
them. Or find a STOUT Oak tree and use
a block and tackle on the stern lifting eyes.

However, you do want to seal the screws.
DuPont 101 is what I'd use. Water makes it
set, so you can put the boat in the water


OutrageMan posted 06-22-2001 10:52 AM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
I too would recomend the 101. However, after my latest experience, water does not set it up very fast. It takes at least 5 hours to skin over, and a full 2 weeks to cure. I would not put it back into the water immediately.


Whalerdan posted 06-25-2001 07:35 AM ET (US)     Profile for Whalerdan  Send Email to Whalerdan     
I saw in the Cabela's catalogue a transducer mount (looks like starboard) that has the screws above the waterline. Check out their catalogue.
66Sakonnet posted 06-25-2001 10:11 AM ET (US)     Profile for 66Sakonnet  Send Email to 66Sakonnet     
Thanks for all of the advice, actually I decided to modify the mounting hardware for the humminbird transducer to fit a lowrance 1240 bracket, had to do some interesting tweaking, but it's working great... the lowrance bracket was already affixed to the transom so no worries...

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