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 Catalina/Capri 25/250 Sailor's Forums
 Catalina 25 Specific Forum
 Depth Finder Installation		  New Topic  Topic Locked
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eyeager66
Deckhand

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2 Posts
Initially Posted - 12/12/2013 :  12:37:46  Show Profile
I'm replacing a depth finder on a C-25. The old instrument is probably an original and occupies a 6 inch hole on the port side of the companionway opening. The new instrument is only about 2 inches wide or so.

Any thoughts on how to install the new instrument into the old opening and make it look decent?

Also, what is the best place to install the transducer inside the hull?

Thanks.
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dasreboot
Admiral

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803 Posts
Response Posted - 12/12/2013 :  13:17:52  Show Profile  Visit dasreboot's Homepage
I'm doing the same thing this winter. I was going to mount a teak or starboard plate over the old hole and put the new instrument on that. My new instrument comes from nasa marine. They say to mount the transducer directly to the hull using epoxy. I was going to mount it forward under the vbearth to avoid bubbles around the keel.
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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts
Response Posted - 12/12/2013 :  14:37:48  Show Profile
Mount a deck plate over the hole. Attach the new depth finder to the deck plate.
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glen
Captain

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359 Posts
Response Posted - 12/13/2013 :  08:57:50  Show Profile
Take the original housing from the depth finder and gut it. If the face is glass, replace it with Lexan. Spray paint the back (inside) of the Lexan to match the color of the housing, use proper paint rated for plastic. You can now mount the new instrument in the old existing housing
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redeye
Master Marine Consultant

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3476 Posts
Response Posted - 12/13/2013 :  09:05:18  Show Profile
<< the original housing from the depth finder and gut it. >>

The "guts" from the original housing held the front glass in place.
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pastmember
Master Marine Consultant

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2402 Posts
Response Posted - 12/13/2013 :  10:06:07  Show Profile
Deck plates/ Access ports are a viable go to solution to a lot of things. If you are not familiar with them they come in several colors, sizes, and closing types; I prefer screw in over snap in myself. Also Hobie makes them that have little storage bags that drop into the ring which are kinda cool. You could easily have two covers, one with your readout and one plain one and splice a plug into the wiring just behind the cover, that way you could put the plain cover in place and put your readout away when you are not sailing.
I hope you are enjoying the forum, when I first logged on I read about a year's worth of posts and it was very helpful to me as a new C 25 owner.
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eyeager66
Deckhand

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2 Posts
Response Posted - 12/16/2013 :  08:49:19  Show Profile
Thanks for all of the advice. It's great to be part of the club now.

I did look at deck plates over the weekend. While I might be able to fit one I would then have the problem of trying to cut a 2 inch hole in the middle. Instead, though, I got contact information for a place that I'm told does custom cuts in starboard. I'm going to try and get a plate cut slightly larger than the existing hole and have them cut a hole in the middle for the new depth finder.
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glen
Captain

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359 Posts
Response Posted - 12/16/2013 :  08:59:55  Show Profile
[quote]<i>Originally posted by redeye</i>
<br />&lt;&lt; the original housing from the depth finder and gut it. &gt;&gt;

The "guts" from the original housing held the front glass in place.

[/On our 1979 boat the glass was sealed to the housing. If the glass wasn’t sealed the unit would leak quote]
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redeye
Master Marine Consultant

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3476 Posts
Response Posted - 12/17/2013 :  14:19:40  Show Profile
&lt;&lt; the glass was sealed to the housing &gt;&gt;

I thought mine was too... till it fell out. I caulked it back in and now I have a porthole.. for the time being.
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MikaDayputs
Deckhand

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USA
22 Posts
Response Posted - 12/19/2013 :  04:54:53  Show Profile
I used waterproof adhesive caulk to "glue" the transducer to the floor in the v-birth. It works pretty good, though now and then it loses the return pulse and has to search for a few seconds before it again receives the return signal.
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glen
Captain

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359 Posts
Response Posted - 12/19/2013 :  08:35:54  Show Profile


&lt;&lt;I thought mine was too... till it fell out.&gt;&gt;

[/quote]
OK good point. Just because mine was, that does not mean all of them are.
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pastmember
Master Marine Consultant

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2402 Posts
Response Posted - 12/19/2013 :  09:24:27  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by eyeager66</i>
<br />Thanks for all of the advice. It's great to be part of the club now.

I did look at deck plates over the weekend. While I might be able to fit one I would then have the problem of trying to cut a 2 inch hole in the middle. Instead, though, I got contact information for a place that I'm told does custom cuts in starboard. I'm going to try and get a plate cut slightly larger than the existing hole and have them cut a hole in the middle for the new depth finder.
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">

You mean you are not going to a surface mount fish finder!!!!!! They are so must less expensive, can come with gps and work so well that most have walked away from the old sailboat depth sounder units.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.