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  #21  
Old 05-05-2013
Mechsmith
 
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Re: What are these things?

Identical to mine, which shoots through the hull for depth gauge transducer. The hole is in the hull liner only. 79 Seafarer 22
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  #22  
Old 05-07-2013
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Re: What are these things?

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Originally Posted by Mechsmith View Post
Identical to mine, which shoots through the hull for depth gauge transducer. The hole is in the hull liner only. 79 Seafarer 22
Mechsmith, have you ever switched the transducer with a plug?
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  #23  
Old 05-08-2013
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Re: What are these things?

Mine does not go through the hull. It shoots through the fiberglass. The flange was simply glued to the hull and the transducer mounted into the flanged part with the threaded knurled cap. No through hull required. This is the same way it worked with my new depth sounder in another boat.
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  #24  
Old 05-08-2013
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Re: What are these things?

Quote:
Originally Posted by Mechsmith View Post
Mine does not go through the hull. It shoots through the fiberglass. The flange was simply glued to the hull and the transducer mounted into the flanged part with the threaded knurled cap. No through hull required. This is the same way it worked with my new depth sounder in another boat.
Interesting.. and certainly a possibility - and a good one at that. Come to think of it there's been no mention of any leakage, right??
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Old 05-13-2013
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Re: What are these things?

Quote:
Originally Posted by Mechsmith View Post
Mine does not go through the hull. It shoots through the fiberglass. The flange was simply glued to the hull and the transducer mounted into the flanged part with the threaded knurled cap. No through hull required. This is the same way it worked with my new depth sounder in another boat.
I thank you for the reply, Mechsmith. I'm trying to process the idea that you're putting forward, but am unable to picture how the sensor or sensing apparatus would meet the water.
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Old 05-13-2013
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Re: What are these things?

So the other day, I took a screwdriver and placed it crosswise through the stiff wire on top, and gently nudged it to create a clockwise pressure.

Today, I was thrilled to see it was dry as a bone.

SO...in case some poor sap finds himself in this position in the future, and happens to see this thread, it will make me feel good to know he was helped.
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Re: What are these things?

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Old 05-14-2013
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Re: What are these things?

Good thing you didn't haul out, take it out, fill it back in, barrier coat, and bottom paint.

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Old 05-14-2013
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Re: What are these things?

It does not have to touch the water. It only needs a seamless interface with it. This is provided by the "cup" being filled with water or mineral oil sufficient to fill the space between the inside of the hull and the face of the transducer. This is the way it was done in my 79 Seafarer. In my 72 I mounted the transducer in a wet spot in the bilge. Occasionally I have to throw a cup of water in the bilge to keep it working.
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