Some years back, a fellow club member had a 1985 C&C 33 II....the cavity
under the mast step that is filled with high density foam got
'contaminated' and the smell was very unpleasant. We tried disinfecting
with every obvious chemical but to no avail. The cavity had to be
cleaned out and it was filled with West System resin....no small job but
a necessary one if you wanted to spend any time in the cabin.
Rob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
On 2015-10-01 1:49 PM, Doug Allardyce via CnC-List wrote:
Dave,
A fellow club member with a 33-2 had big problems with his mast step
to the point that he couldn't keep his rig tight. He did allot of
rebuilding inside the boat, including the cavity under the step that
is filled with high density foam. After 30+ years it breaks down and
you can't get proper torque on the leading keel bolt. If you have the
"smile" on the leading portion of the keel where it beds up against
the fiberglass hull, I would guess that you no longer have the support
under the mast step that you need, and tightening the keel bolt just
starts to compress the step adding to the problem. This has been a
common issue on several C&C models. I have a 35-3 that needed repair
for that reason. Not an easy fix, but it can be done. If you want to
share you email address, I will send you pictures of the my 35-3 fix.
Doug
~~~~~~~~_/)~~~_/) ~~~~~~~~
-----Original Message-----
*From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com]*On Behalf Of
*Dave Syer via CnC-List
*Sent:* Thursday, October 01, 2015 12:01 PM
*To:* cnc-list@cnc-list.com
*Cc:* Dave Syer
*Subject:* Stus-List C&C 33 mkii mast step revisited
Hi All,
So I checked the various posts and photos available, and chatted with
one lister, but I have yet to see a really clear description of
outright failure of the mast step area, other than repeat references
to the 33ii collapsing mast step syndrome, and the assertion that the
construction is inadequate. So, I took my (unfailed) boat apart,
'cuz, well, that's what I do...
The mast sits in a rectangular cast-alloy base, that is longer and
wider than the mast itself. This allows mostly for shimming fore and
aft to adjust mast rake.
The alloy base sits on the 'glass liner, which sits on a piece of
3/4"plywood, which sits on a pile of putty,(bog) which sits on a built
up section of glass where one of the keel bolts penetrates and on a
fabricated fiberglass cross-member spans the bilge, athwartships. This
cross-member (aka "floor timber") is a hollow fiberglass beam which is
semi-elliptical in section. (like an inverted trough.) It is part of
the "spider" or whatever they called it, which stiffens the hull.
The mast is still stepped, so I can't yet go further, but for now I
can see three areas of potential failure:
1: The wood can deteriorate allowing the mast to settle by its thickness,
2: the putty could fracture crumble, move, fail, - ditto,
3: worst of all, the cross-member could conceivably collapse, allowing
the mast to settle by some portion of its height. This would not be
good....
If my mast step has settled, it's not by much. To me, the wood and
putty part is kind of cheesy, and I'll re-do that anyway because it
bugs me and I think wood in a wet place is bad news. The crossmember
looks really strong, and while I have this apart I could get clever
and reinforce it, but it may be totally unnecessary.
Has anyone actually observed the mode of this particular failure? Can
anyone confirm that this crossmember has been a failure point in
normal use and has contributed to this purported flaw in the boat?
Thanks! Dave
BTW, I will document and post this work for the benefit of future
generations.
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