Depth Sounder Installation

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Marty

I am going to install a depth sounder in my 82 C25. I would like to install it through the hull in front of the keel. Are there any tricks to setting the tranducer at the correct angle, pointing downward rather than angled forward. I am concerned that when I need the shallow reading it will be distorted because the hull is sloping upward and I will get a false, deeper reading. I am leaning toward the garmin 240 fishfinder. I would enjoy your feedback on good installs, how critical is the location of the transducer, any other comments? I have only been sailing for a year / and have owned this boat for a year. Have not hit bottom yet - but my day will come. :) Thanks Marty
 
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Steve Dion

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Dec 2, 1999
15,184
Hunter Vision-36 Rio Vista, CA.
Why mount it thru the hull!

Marty: Why bother mounting a thru hull fitting. You should be able too mount it to the "inside" of the hull. You can do this with silicone, epoxy or other materials. Contact the mfg and ask them if their transducers will work or not. We have had ours mounted inside the hull for 15 years, works great.
 
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Marcus Hart

I agree with Steve

I just installed a Garmin 168 with sounder. The transducer is a hull maounted but can be installed inside the hull. I built up a "platform" for the transducer to sit on by building a dam of silicone. Fill the dam in with boat yard resin. Let dry and then place the trnasducer on top of that and add more resin. It works great and a whole lot easier than putting another whole in the bottom.
 
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Ed

Depends on Hull Construction?

I was told that surface mounting on solid laminate constructed hulls was o.k., but cored hulls would not transmit/recieve the signal as efficiently. What is the construction of an '82 C25?
 
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Steve Dion

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Dec 2, 1999
15,184
Hunter Vision-36 Rio Vista, CA.
Always need to test first!

Ed: When you do this installation you always need to test the location first. You can use a baggy with water in it or peanut butter (good for attracting mice too). Once you know that the location is OKAY, you can mount it with epoxy or silicone.
 
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Marty

Thanks

Thanks for the input. I had heard of internal mounts and you have convinced me. This would also allow me to build a level placement. I will confirm that c25 is glass only construction. The tip on testing the transducer location is excellent - I think I'll go with the bag of water rather than the peanut butter and mice method :) thanks again Marty
 
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Bob Camarena

OK, You're not going to believe this but...

it really works! Buy a wax, toilet bowl mounting ring at the hardware store. Use a big glob of the wax (it's like beeswax) to stick your transducer to the inside of the hull. I'd estimate that there's about 1/8" of wax between the transducer and the hull and about 1/2" or so globbed around the perimiter of the transducer. I did this about 4 years ago to test the installation location before permanent mounting on the advice of a friend and it's been working ever since. I've never had the need for a more permanent mounting. My friend's has been "wax-mounted" for even longer. Try it, you have nothing to lose except the price of the wax ring and report back to us.
 
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Pete

transducer mounting

Yes, I also have my transducer laying in the hull on my Mac 26x. It works great MOST of the time although once in a while it starts giving wild readings. I then put a little water on it and it works fine again. Why put a hole in the hull if you can avoid it? Think I will try the wax ring idea on this forum. Pete Hobe Sound, Florida
 
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RAY

Monkey @#*%

I also used what is known in the electrical world as "monkey @#%*" . I tried it temporarily on a Morgan 25 and it stayed for 3 years.
 
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