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post #1 of 5 Old 04-10-2006 Thread Starter
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Through-hulls?

I am planning to get my bottom finished this weekend. The transducer for the depth finder is very old and huge, hanging under the boat. I would like to remove it and the damaged water speed wheel. Does anyone know if there is any kind of "patching" device available? I'm thinking something like just two peices of thin steel sheet metal, one on the inside and one on the outside bolted together with some kind of a gasked or adhesive silicone or something. I know it might sound wierd but I want to get it in the water for the season here and keep the option to re-use the through-hulls when I take the boat back out to get it ready to head south.
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post #2 of 5 Old 04-10-2006
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Don't know if I'd use steel as you describe, possible cut a disk of suitable material, wood starboard etc. to fill the hole, goop it in with some kind of adhesive sealant, then use larger disks gooped up and screwed tightly to cover the hole top and bottom, but just a disk of sheetmetal no, I'd stay away from that. screw everything together, don't rely on the adhesive alone

ken.
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post #3 of 5 Old 04-10-2006
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You should have (somewhere) a replacement plug for the speed transducer - if not they should be available at a dealer or used sailing shop. These are provided to replace the impeller during haulouts to avoid sling damage.
As for the other, I'd leave it until you're ready to do the proper job - it probably doesn't leak now and is plenty strong. Patch-up jobs such as what you are contemplating are likely to cause more trouble in the short term.
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post #4 of 5 Old 04-11-2006
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A couple of other reasons to avoid using metal to "patch" the voids where you plan to remove transducers are:

Corrosion- Always a possibility with submerged metal on a boat. This is not an area of the hull where you want any holes.

Anti Fouling- Your new bottom paint is likey to come off the metal patches before too much time has gone by, leaving spots that will become very foul, very quickly.

As previously mentioned, if you want to simply remove a transducer, find a dummy plug to go in the thru-hull. If you want to actually remove the thru-hulls, do a proper repair with fiberglass and gel coat.
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post #5 of 5 Old 04-11-2006
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The image is a bit out of focus, but is a pre-purchase photo showing my boat's impeller plug in place. The actual impeller is sitting on a nearby stringer.



Perhaps your boat has one stored in a locker somewhere.

True Blue . . .
sold the Nauticat
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