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 Depth sounder re-install		  New Topic  Topic Locked
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strataview
Deckhand

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12 Posts
Initially Posted - 02/21/2004 :  13:56:57  Show Profile
What is the proper way to install an inner-hull depth sounder?
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ClamBeach
Master Marine Consultant

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3072 Posts
Response Posted - 02/21/2004 :  14:28:32  Show Profile
What do you mean by 'inner-hull' ?

A transducer that uses a hole drilled through the hull... or one that get's epoxied (or floated in oil) inside the hull without drilling a hole?
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strataview
Deckhand

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12 Posts
Response Posted - 02/21/2004 :  14:49:03  Show Profile
Its one that gets epoxied I guess, mine fell off and I need to re-install it, but I've heard about the oil thing and wonder if it needs to be modified like that or if I should just use 5200 to mount it and be done.
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lcharlot
Master Marine Consultant

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Antigua and Barbuda
1301 Posts
Response Posted - 02/22/2004 :  11:17:38  Show Profile
From Garmin's instructions for installing a transom mount transducer inside the hull:

1. The hull must be solid fiberglass, not cored
2. The mounting surface must be smooth, clean, and as close to flat and level as possible.
3. Bed the transducer to the hull with silicone. The layer of silicone between the transducer and hull <i>must</i> be free of air bubbles or performance with be adversely affected.

I have heard of people using epoxy or 5200 to bed a transducer, but the problem with these compounds is that it is very difficult to remove the transducer without damaging it, if the location or installation doesn't work out and you need to move the unit. Voids or bubbles in the gelcoat or laminate that you can't see can result in poor performance, requiring you to move the transducer somewhere else; if it was bedded in epoxy, you will probably not be able to get it out of there intact. Using silicone as the bedding compound allows you to easily cut the transducer out with an Exacto knife or sharpened putty knife if you need to move it later.
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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.