Mounting new SONAR Transducer to Transom

Repair or modification of Boston Whaler boats, their engines, trailers, and gear
glurtis
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Mounting new SONAR Transducer to Transom

Postby glurtis » Thu Aug 09, 2018 8:28 pm

I would appreciate any suggestions as how to proceed to replace the transducer from the old to the new transducer.

glenn

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GoldenDaze
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Re: Mounting new SONAR Transducer to Transom

Postby GoldenDaze » Fri Aug 10, 2018 6:46 am

I recently replaced a SONAR transducer, and of course the new mounting holes did not line up with the old mounting holes. I cut a small rectangle from some leftover KING Starboard, mounted it to the hull using the old mounting holes and some 3M 4200, then drilled the Starboard for the new mounting holes, making sure to choose screws that didn't penetrate to the gelcoat.

transducer mount.jpg
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Last edited by GoldenDaze on Fri Aug 10, 2018 11:11 am, edited 2 times in total.

jimh
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Re: Mounting new SONAR Transducer to Transom

Postby jimh » Fri Aug 10, 2018 7:47 am

Examine the existing mounting holes on the transom that remain from the old SONAR transducer location to see if any can be re-used to mount the new SONAR transducer. For any old mounting holes on the transom that cannot be reused, fill them with epoxy resin. Drill new holes for the new SONAR transducer mounting.

Jefecinco
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Re: Mounting new SONAR Transducer to Transom

Postby Jefecinco » Fri Aug 10, 2018 11:08 am

Daze,
It was clever to use the original transducer's mounting holes to mount the Starboard adapter. An added benefit is that the adapter can be slightly oversized to accept some of the more outsized transducers used with modern sonars. On the curved transoms of many classic boats the curvature presents some added challenges.
Butch

glurtis
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Re: Mounting new SONAR Transducer to Transom

Postby glurtis » Fri Aug 10, 2018 5:22 pm

Thanks for the tips. How about getting the old cable out and the new cable in?

    a. Tie pull string to old cable under console and pull out through to the stern?
    b. Tie new cable to pull string and pull new cable to the console?

I have a 2001 Dauntless 160

glenn

jimh
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Re: Mounting new SONAR Transducer to Transom

Postby jimh » Fri Aug 10, 2018 5:41 pm

    c. pull in a new pull cable when pulling in new SONAR transducer wiring with the temporary pull wire

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GoldenDaze
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Re: Mounting new SONAR Transducer to Transom

Postby GoldenDaze » Fri Aug 10, 2018 10:32 pm

There's not a lot of room in the rigging tunnel, so I'd go with approach (a) because the plug at the console end is smaller than the transducer.