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Consider using monel for any bolt exposed to salt water. It is more
resistant than SS.
Richard
wwp15#1511 Sirocco
> ----------
> From: Sam Finlay
> Sent: Tuesday, March 9, 1999 10:47 AM
> To: wwpotter@tscnet.com
> Cc: david_kautz@hp.com
> Subject: Leaking Centerboard Pivot
>
> - - - - - - - - - - - - - - - - - - - - - - - - - - -
> West Wight Potter Website at URL
> http://www.lesbois.com/wwpotter/
> - - - - - - - - - - - - - - - - - - - - - - - - - - -
> Dave,
> I'm sure that many of us are curious about this problem. When I replaced
> my Centerboard
> last year I tried to get a good look at the pivot. This proved impossible
> as we did it on the water
> and the light wasn't good enough. When we got home I crawled under the
> trailer and could see
> the bolt on either side of the c'board and it looked fine but seemed to be
> an ordinary threaded
> bolt w/ the board riding on the threads. That's not the best way to ensure
> longevity of the galvanizing
> in my opinion. So I considered replacing the bolt. On my boat ( #1964 )
> there is no way I can see to get at
> the bolt. I can see the port side through an access hole, but to see the
> starboard side, I'd have to cut through
> the floor. The part I can see has no evidence of a bolt at all. It looks
> like HMS just laid a glob of fiberglass over the whole thing. If your boat
> is like mine, I'd guess that you'll have to grind off the 'glas to reach
> the bolt head to
> remove it. It might even be necessary to grind off both sides to loosen
> the bolt. Not a nice job but
> doable. It might be preferable to replace the bolt w/ a galvanized pin so
> that the threads wouldn't cut into
> the centerboard's slot.
> Another possibility might be that ( if the bolt isn't corroded ) you
> could "careen" the boat on it's side
> and pour penetrating epoxy into the fiberglass where the bolt enters it.
> The next day you could roll the boat over on the other side and repeat the
> process. This would eliminate any "pockets of water" around the bolt.
> Naturally the boat must be very dry for this to have any chance of
> working. If the bolt is stainless steel this would
> be a bad idea because stainless needs oxygen for corrosion protection.
> Any one else have any ideas?
> Sam
> P-15 Indomitable
> Luray VA
>
> I think the centerboard pivot bolt on the Tilly Lucy is leaking. Before
> I took my centerboard out (and I had to beat on it pretty hard to get
> the rusted up thing out) to be galvanized, the bilge on my boat was
> always completely dry. I've been sailing twice (Angel Island and the
> Estela, both all day affairs) since putting the boat back together and
> each time I've had to take out about 2 quarts of SF Bay afterwards. What
> makes me think it's the pivot is I'm getting water in the bilge in FRONT
> of the CB as well as behind it. Water that comes up through the CB trunk
> looks like it has to end on the cushions or in the aft part of the
> "keel" after running down the liner.
>
> Has anyone on the list ever taken this apart? I did see Harry's P-14
> when it was in pieces (good testimonial for galvanizing), but the design
> is very different. On mine, what looks like a bolt when viewed through
> the slot (you can see some threads) is fiberglassed over with some
> chopped-strand mat on both sides of the centerboard trunk. The bolt can
> be "wiggled" so I'm quite sure that there isn't a watertight seal
> anymore between the bolt and the centerboard trunk and I suspect that
> some water (about half a pint per hour) is leaking through a crack or
> opening in the "glassing over".
>
> I'd like to rebuild this making sure that there is a good seal between
> the pivot and the inside (water side) of the CB trunk. I don't like the
> idea of water just sitting in the pockets formed by the glassing over of
> the pivot.
>
> I'd appreciate advice on what lurks under that fiberglass covering and
> any improvements that might be made - I'd like to do this RIGHT so that
> I only have to do it ONCE!
>
> Thanks,
>
> Dave Kautz
> P-15 #1632 Tilly Lucy
> Palo Alto, CA
>
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