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 Catalina 25 Specific Forum
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dave1948
Deckhand

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7 Posts
Initially Posted - 03/28/2005 :  10:26:58  Show Profile
I am replacing the gudgeons on my 78 C25 and repairing the spider cracks around the lower one. I would like to reinforce the lower transom where the bolts go through and wonder if anyone has any suggestions. I was thinking of a piece of teak or starboard backing one of the tech tips had mentioned marine plywood, but I don't know where I'd get a piece that small. I like to do jobs once right and forget about them.

dave
78 cat passing wind
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ClamBeach
Master Marine Consultant

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3072 Posts
Response Posted - 03/28/2005 :  12:24:43  Show Profile
"I like to do jobs once right and forget about them."

That's a good philosophy to have when dealing with things that can sink.

West Marine (and other marine vendors) sell Starboard and Teak in various quantities. Even if you get a bigger piece than what you need for the gudgeon, I'd bet you'll find plenty of other places to use the rest as you work your way through the boat beefing things up.

Most areas will also have 'specialty' lumber suppliers that cater to cabinet makers. They will likely have Teak if that's what you choose to use. (Also available over the web).

If you go with plywood, I'd saturate thoroughly with Epoxy before installing (and after drilling the holes). For teak, I'd finish with Cetol to resist moisture intrusion. Starboard should be pretty darn inert. On my boat I've used a lot of "Hi-Moly" (high molecular weight plastic) as backing... it's available from hardware stores and industrial suppliers.
(or as scrap pieces where I work ;>)

Another alternative is to use a piece of 3/16" stainless (316) about 4" x 6". Whatever you use, be sure to round the corners of the backing material to prevent stress concentration and bed it well with Lifeseal or 3M 101... or in this case, I suppose 3M 4200/5200 might be appropriate.
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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts
Response Posted - 03/28/2005 :  12:42:41  Show Profile
What does the current plate that the gudgeon screws into look like from the inside? I know it is somewhat glassed into the transom, but is it fully inside the transom fiberglass or is it sitting on the outside surface?
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dave1948
Deckhand

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7 Posts
Response Posted - 03/28/2005 :  16:42:28  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by dlucier</i>
<br />What does the current plate that the gudgeon screws into look like from the inside? I know it is somewhat glassed into the transom, but is it fully inside the transom fiberglass or is it sitting on the outside surface?
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
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dave1948
Deckhand

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7 Posts
Response Posted - 03/28/2005 :  16:43:39  Show Profile
<blockquote id="quote"><font size="1" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by dlucier</i>
<br />What does the current plate that the gudgeon screws into look like from the inside? I know it is somewhat glassed into the transom, but is it fully inside the transom fiberglass or is it sitting on the outside surface?
<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">
It held to the transom with through bolts and lock nuts
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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.