Peter:
That the unsealed end of the plywood shows signs of water damage does not mean
you have a core problem past the edge. In addition, I view water sloshing
around as encouraging – it would not be sloshing around if it went somewhere
else (where it couldn’t be seen). After the area is air dried for a few days
(a hair dryer would be better, but you obviously need electricity for that), I
suggest starting with a moisture meter to determine if cored wood near the
chainplate connections shows elevated moisture to the point it becomes a
concern. If the core is not wet (as I suspect), seal up the exposed edges of
the access portal and move on to the deck. The deck core around the chainplate
cut-out may also be an issue. You should check/repair this as well before
re-bedding the deck fitting. I would not use 4200 for anything, especially
since reading the article about how it can turn back into goo after a year or
two (don’t know if 3M fixed that problem). Based on suggestions from this
list, I now use Bed-It for all deck fittings. It works very well.
Good luck!
Matt
C&C 42 Custom
From: Peter McMinn via CnC-List <cnc-list@cnc-list.com>
Sent: Thursday, November 9, 2023 1:26 AM
To: Stus-List <cnc-list@cnc-list.com>
Cc: Peter McMinn <petemcm...@gmail.com>
Subject: Stus-List chain plate rebed ahead
Greetings,
I discovered water via failed bedding at the starboard chain plate had been
draining into the cavity behind the settee bulkhead where the plate/nuts are
accessible. It's all glassed but the trapped water sloshed during sailing and
saturated the unsealed plywood edges of the access port. Now I'm worried about
rot around the plate bolts in addition to a wet deck core. Ugh.
I've temp sealed the deck plate with Gorilla tape and am considering ways for
drying things under deck (we're on a ball so no AC). Once I get a handle on any
rot issues, I'll be cleaning/rebedding both chainplates.
Any thoughts on this process?
Thoughts on using butyl tape for bedding instead of 4200?
The nuts/bolts were new when new chainplates were installed in 2011. Should I
replace these?
The boat is a 1985 37' 6.7 draft
Any expertise, references, links will be most appreciated.
Peter McMinn
SV Sirius
_/)
Please show your appreciation for this list and the Photo Album site and help
me pay the associated bills. Make a contribution at:
https://www.paypal.me/stumurray
Thanks for your help.
Stu
