Is Epoxy better than Goop for transducer mount?

[bajadog]

Originally Posted by Grego

I heard if you mix 4200, 5200, 5200 fast cure, epoxy, marine goop, plumbers goop, vaseline, RTV silicone, and add a little water with a sprinkle of foam you get the bestest reading and bond.

You forgot mucus.

[Kevin]

I've used both marine goop and two part epoxy. By far two part epoxy gives you a better picture. Its not even close. The key is how you install it. Marine goop is just too soft and dampens the sonar quite a bit.

Get some adhesive putty and create a well for the epoxy. The epoxy will cure thinner and get brittle if it is allowed to spread out. Creating the well gives you a thicker section. I'm sure there are a lot of other brands but I've used ACE two part epoxy for plastic and it works perfectly. No oil canning and I've never had the transducer pop off. And I've taken some long road trips (including off road) up to the sierra's with my kayak on top. Never had a problem.

Kevin

[Montesdad]

I'm just getting ready to mount a humminbird transducer (one of the quad beam units) in my revo and this is a great post however -

now I'm totally confused - - these things are too big to hang over the side so internal 'tween the masthead and the drive well seems the best option.

i only want to have to do this once - will having the Goop warmed help eliminate bubbles? When i put some weights in my pedals to keep them upright, it seemed to flow pretty well and was not too thick.

i'd heard one only gets one shot at this with the transducer itself, after that, you have to end up using the water bath to get a clear picture thru the hull or hang it over the side cause you cant get all the goop off the unit and then you'll be dealing with the bubbles thing when reattaching.

My backup thought was to just build a reservoir, surrounding the area with foam - say 1 1/2" high and Goop the foam into place, C-clamp the transducer with it's mounting bracket to the mast post and set it against the bottom of the hull, fill the reservoir with Perrier and use that way - might work well with minimal maintainence and the transducer is easily removable and reusable - then drink the remainder of the Perrier.

I usually transport the Revo top up so I'm not worried about water in the internals - I figure if I ever got in the position that the water came out of the reservoir while out in the ocean, using my fish finder wouldn't necessarily be at the top of my list of things to be worrying about - - - -