Through hull transducer in a '94 hull?????

[mtboat]

Hi all.

Boat in question is a 1994 Cobalt 272. I'm attempting to replace a old rectangle Lowrence 3200 depth sounder with glued in transducer.

I purchased a Hawkeye depthtrax 2bx that comes with a transom mount transducer which I'm not sure I'd want to use. I've read where people have glued a transom mount style in the hull and it supposedly worked. Anyone that has done this I'd be interested in hearing the outcome.

My main question is if anyone has installed a through hull transducer in these older boat hulls? Is there any reason I should not? I called Cobalt and wasn't necessarily told not to but to "be careful" and that newer Cobalt boats have a block incorporated into the hull to strengthen it where the transducer hole is drilled.

Thanks in advance.

[capn272]

I've got a 98 272, and upgraded to a 9" Garmin unit on the dash. I just drilled a hole on the starboard side under the swim platform and mounted a transom transducer. It came with a clamshell. The whole area got a bunch of 4200 to seal it up. The depth sounder has been disconnected.

At speed the transom transducer usually works. Also, at speed I'm paying attention to the topo lines and staying away from anywhere expected to get shallow. I mostly use it for surveying the bottom when considering where to drop anchor.

I considered a through-hull mount, but to be honest I'd much rather drill a small hole above the waterline than a large one under the engine.

[capn272]

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