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-   -   Keel Joint Issue (http://www.sailnet.com/forums/gear-maintenance/63772-keel-joint-issue.html)

Birdface 04-12-2010 09:24 AM

Keel Joint Issue
 
Hey everyone,

Getting ready for another glorious sailing season....

I have a 1976 25' O'day that you've all helped me renovate over the past 5 years.

I was quickly scraping my bottom and inspecting before moving forward with season prep and the normal crease between my lead keel and fiberglass keel-stump chipped off too easily. I kept pulling off what looked like 35 year old putty and found some peeling caulk (flexible caulk, not 5200 or anything) between the two. Under the loose putty it was moist.

I've attached a picture. Keel bolts look fine inside, keel seems sealed.

Do I just need to re-caulk, re-putty, and paint? Should I epoxy? Do I need to glass this over?

Much appreciated,
Birdface

http://www.birdface.com/Adam/Picture%20101.jpg
http://www.birdface.com/Adam/Picture%20102.jpg
http://www.birdface.com/Adam/Picture%20026.jpg
http://www.birdface.com/Adam/Picture%20047.jpg

sailingdog 04-12-2010 10:02 AM

When was the last time the keel was dropped and the keel bolts inspected? The boat is 34 years old, and if this hasn't been done in the past ten years, it probably should be done before doing anything else. Then you can properly re-bed the keel-hull join and tighten up the bolts.

Birdface 04-12-2010 10:07 AM

Nice, okay thanks. So I need to have my yard lift the boat. Is the rest of the job for a professional?

What am I looking for when I drop the keel? Is there a thread on "properly" re-bed?

Sailingdog, I wish I could download your brain into a book with pictures and diagrams ;).

You rock.

sailingdog 04-12-2010 10:29 AM

Basically, you'll have to have the yard move the boat onto boatstands, like you would for winter storage...then you have to go inside the boat and remove the nuts from the keel bolts... and then the yard will lift the boat off the keel. Make sure the keel is properly braced so it doesn't shift or fall over.

Inspect the keelbolts, since there can often be crevice corrosion, especially in the case of stainless steel bolts, which won't be apparent by a more casual inspection. If the bolts appear to be in good shape, without severe corrosion or erosion/thinning of the metal, then re-bedding the keel may be all you need to do. If in doubt, consult a surveyor other marine professional to evaluate the keel bolts.

Clean off the old sealant of the hull and keel. If the keel is lead, scrub the top surface with a scotch brite pad to clean off any oxidation, then apply sealant to the surface and lower the boat onto the keel...and tighten the bolts to whatever the factory specification is. This will vary with bolt size and is often boat specific.

Some people like to use 3M 5200 for this...I'd recommend using either SikaFlex 291 or 3m 4200. I think that 3M 5200 is just a bit too aggressive.

Quote:

Originally Posted by Birdface (Post 591993)
Nice, okay thanks. So I need to have my yard lift the boat. Is the rest of the job for a professional?

What am I looking for when I drop the keel? Is there a thread on "properly" re-bed?

Sailingdog, I wish I could download your brain into a book with pictures and diagrams ;).

You rock.

As for downloading my brain...what a disaster that would be. :D

mitiempo 04-12-2010 11:08 AM

Good advice. And all from a sailor whose boat doesn't have any ballast.:D

Birdface 04-12-2010 11:34 AM

HAHAHA good point, but I have a feeling he's spent some time in a mono hull at some point in his past.

sailingdog 04-12-2010 11:58 AM

Yes, as I spent quite a bit of time as an OPBYC member... and there are just more monohulls available there.

Quote:

Originally Posted by Birdface (Post 592038)
HAHAHA good point, but I have a feeling he's spent some time in a mono hull at some point in his past.

Why do you think I sail a multihull. ;) Ballast problems suck... so does having to rebed a keel. But, somehow, even though I don't own a leadmine, I end up doing this stuff for friends that do...
Quote:

Originally Posted by mitiempo (Post 592029)
Good advice. And all from a sailor whose boat doesn't have any ballast.:D



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