What is the best adhesive to use on a depth finder puck in the buildge. Silicone, 5200. Epoxy. Or?

You can use just about anything you want since ultimate tensile strength is not the objective. All the adhesive needs to do is hold it in place. That said, no matter what adhesive you use, you need to make sure there are no air bubbles in it. If you do manage to trap some air, you'll never get correct readings, so be careful.

On a related note, have you checked your planned location to make sure it works? Many cored hulls have small air bubbles in the laminate - which cause the same problem I mentioned above. The best way to test your planned location is to place the (hooked up) transducer in a plastic bag filled with some water. Then place it in your bilge - holding the puck down - with the boat in a known depth of water. (Depth below the hull.) See if you get a correct reading. If you don't move it around until you find a location that reads correctly.

Hope that helps.

There is a spot made for it in the eng comp. What ever adhesive they used from the factory didnt hold . I was thinking of sanding the spot on the hull and the puck and useing silicone.

Tom,

I use the one's from the manufacturers such as Lowrance, etc. They seem to be of less density and don't leave air bubbles. Any voids and bubbles are the killer. Can't offer an opinion on RTV.....

Good luck!

OR

I've done that before with success. The trick is to lay the silicone / RTV in carefully - and not too thick - so that you don't get any air bubbles. Oh, and clean the hell out of all surfaces with acetone or something similar first.

Thats what i was thinking . A thin layer of rtv or silicone on a clean scuffed area.

IMO what I have found to work the best is scuff the area really well and then clean very well with a mild cleaner then water. I have used Lowrance epoxy kits as we buy them packs of 6. Then would lay a bag of kitty litter on top of the puck for weight to hold it down for at least 12 hours. Never had a problem

Lowrance sells depth & fish finders and other related electronics just incase someone did not know who they were.

Yoru transducer mounting needs to make sure it is set in an area of solid glass - no cored areas plus do not angled mount it as then your depth reading will be way off instead of shooting straight down to read correctly.

I got this,,,,,,,, Does not apply to Cig's & Apache's :b unnydance: