Patrick,
I recently replaced 8 thru-hulls, 8 seacocks, and 2 transducers on my LF38.
Yes, Wally’s site is a great resource. I reamed back the coring and filled
with thickened epoxy. While the hull is cored with balsa, the region where
the thru-hulls are is cored with marine plywood. Thankfully, removing the old
thru-hulls showed dry coring, so I guess they were originally sealed well. I
found two thru-hulls with threads red and very pitted, and they were likely
close to failing. Removing the thru-hulls are easy with the correct tool,
so I suggest that you at least check all of them. But with wet decaying
backing plates, I would not wait...
I have not gotten around to write anything up yet, but I do have a bunch of
photos tossed online:
https://www.flickr.com/photos/dreuge/sets/72157652746226231
-
Paul E.
1981 C&C 38 Landfall
S/V Johanna Rose
Carrabelle, FL
> On May 20, 2015, at 2:56 PM, cnc-list-requ...@cnc-list.com wrote:
>
> Date: Wed, 20 May 2015 11:18:36 -0700
> From: Patrick Davin <jda...@gmail.com <mailto:jda...@gmail.com>>
> To: "cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>"
> <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>>
> Subject: Stus-List Are original LF38 thru hulls in contact with
> coring?
> Message-ID:
> <CAHixY6TL3Xog-g=Nh9EVcEaxoXKmHNtpUj+fJ+4w=kug10u...@mail.gmail.com
> <mailto:CAHixY6TL3Xog-g=Nh9EVcEaxoXKmHNtpUj+fJ+4w=kug10u...@mail.gmail.com>>
> Content-Type: text/plain; charset="utf-8"
>
> My first haul out is coming up in 3 weeks, just for a few days to do some
> small tasks like unsticking a seized seacock and maybe installing a new
> speed transducer (old Datamarine one is somewhat broken).
>
> I've read Wally's site cover to cover and know he redid his thru hulls
> reaming out some core and filling with epoxy (and even glassing over). But
> were all model years constructed without that done or did later C&Cs start
> sealing their thru hulls better? It's surprising to me that they wouldn't
> have protected the core out of the factory.
>
> Do I need to inspect all thru hulls or only prior-owner installed ones? I
> might postpone this till the fall since it'll be a big job, just wondering
> if it's worth pulling one now (even that I don't expect to be easy).
>
> If all cored C&Cs were installed with coring abutting the thruhull, I'm
> surprised it doesn't sound like everyone has redone them (it looks like
> only 2 or 3 people have asked about it on the list - although more may have
> done it). Or is the concern overdone? From the standpoint of "don't mess
> with it if it ain't broke" maybe it's better to just do nothing. Except
> that the plywood backing plates are wet/decayed, so eventually I'll need to
> at least do something with those (which may or may not involve replacing
> the seacock and thruhull too).
>
> -Patrick
> 1984 LF38 "Violet Hour"
> Seattle, WA
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