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 Installing a transducer behind the keel?		  New Topic  Topic Locked
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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts
Initially Posted - 04/06/2014 :  16:05:04  Show Profile  Visit delliottg's Homepage
My in-hull transducer failed last year, and I've been making do with a Humminbird fish finder shooting through the bow with OK results. However the cable is too short to be able to be routed properly so it's less than optimal.

I'm considering shooting through the hull directly below the cabin ladder in the compartment beneath the aft berth. Other than the obvious that the transducer isn't in the bow, and the wing keel will be blocking part of the signal is there any reason to not do this? I'm thinking if I mount the transducer closer to the stern to miss the wing keel that will mitigate that problem.

I also have a line on a Garmin GPSMap 198C that comes with a transducer, but don't know the length of the cable yet. It uses the same data cards as my 276C (which is starting to have behavioral problems), has a bigger screen, and I should be able to swap out the data cable leads to be able to drive both DSC & auto-pilot from the unit. I'm waiting to hear back from the CL ad, so I don't know if this is a viable replacement.
David
C-250 Mainsheet Editor


Sirius Lepak
1997 C-250 WK TR #271 --Seattle area Port Captain --
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frog0911
Master Marine Consultant

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USA
1349 Posts
Response Posted - 04/07/2014 :  09:47:34  Show Profile
I have a Garmin 546s and mounted my transducer in that space in a waxed ring. It worked very well, but it is not the ideal location, since the keel has already made contact before you find out it is to shallow. I moved it into my other boat were I use it as a fishfinder, since I already have depth available from my Navman instruments.
Edited by - frog0911 on 04/07/2014 09:48:45
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Chief RA
Chief Technical Advisor

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USA
191 Posts
Response Posted - 04/15/2014 :  08:17:54  Show Profile
David: You should be able to extend that transducer cable or buy an extension. Just got home a couple weeks ago. Carole and I had a great trip for 3 months on Colorado river in Arizona. Caught lots of Largemouth bass, Channel cat and large perch. We each got a 19" Large mouth bass! Chief
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ruachwrights
Captain

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USA
258 Posts
Response Posted - 04/15/2014 :  13:42:01  Show Profile  Visit ruachwrights's Homepage
I installed mine in that location. It works great while motoring not so well when heeled. Our sterns are rather flat.

Vern Wright
Hajime
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CJRoxs
Navigator

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USA
114 Posts
Response Posted - 04/18/2014 :  12:35:59  Show Profile
I have a Garmin Elite 5e. I installed the transducer below the companion way in the bilge opening. I haven't had a problem, works great even when heeled. I figure that by the time you see the depth is to shallow it won't matter if it is in front of the keel or behind. Your reaction time isn't quick enough to make a difference. Avoidance is the key. I won't go in anything under 10 feet without stopping and pulling the board up. Then I won't go in anything less then 3 feet.
Edited by - CJRoxs on 04/18/2014 12:37:48
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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.