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Catalina/Capri 25/250 Sailor's Forums

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What kind of tabernacle nuts do you have?

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Initially Posted - 01/07/2008 : 13:17:01

So I was looking at the nuts on the underside of my tabernacle/compression post and noticed that there were two regular nuts and one acorn nut to cap each of the four bolts. Looking at nearly all the other bolts in the overhead, they all with the exception of after market installs by POs have barrel nuts. Does your boat have barrel nuts (IE: flush to the ceiling like your T-tracks) or the three nuts I mention like mine? I don't have a picture of what I'm talking about, didn't have the camera with me, but I can post one if it'd clear up what I'm asking about. I've noticed what appear to be leaks around them but hard to tell, I haven't found actual water there, but some water trails down the compression post, but it could just be condensation. If they're PO installed, I'm definitely re bedding the tabernacle over the winter, if it's factory, I may just leave it alone for the time being.

David
C-250 Mainsheet Editor

Sirius Lepak
1997 C-250 WK TR #271 --Seattle area Port Captain --

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Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 01/07/2008 : 18:27:59

David,
The nuts used on my compression post were lock nuts, the type with nylon to prevent them from backing off.

I too had a little water running down my post a couple years ago. I removed the mast support and re-bedded it, that solved the problem.

Here's what the post looks like out.

Looking at the hole from the inside, you have wood there so don't delay to long before you re-bed.

This is the post bracket on the cabin sole, the post slips over it. You can see standing water from my leak inside.

After a good cleaning I slid the post back in until it was a few inches before touching the cabin top.

I spoke with Catalina and they told me to use 3M 4200, I applied a good amount 4200 all around. I waited until the post was down this far to prevent the post from dragging most of the 4200 off as I was pushing the post down.

I applied 4200 around the bolts and slid them in, snugged everything up but did not tighen. Waited until the next day to tighten it up.

Hope this helps.

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Jarrett Anderson
1st Mate

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61 Posts

Response Posted - 01/07/2008 : 19:18:14

Same nuts, same problem, same fix.

Jarrett _/)

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Nautiduck
Master Marine Consultant

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USA
3704 Posts

Response Posted - 01/07/2008 : 20:32:05

Tom, thanks for the photos. Pictures are worth a thousand words. It helps to see how the post fits in the whole system. On my C22 the mast step was a separate piece. On the 250 it looks like it is welded to the post. Correct?

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Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 01/07/2008 : 20:46:37

Yep, one piece.

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Response Posted - 01/07/2008 : 20:52:03

Hah, Tom, those photos are great! Thanks. I thought the tabernacle just sat on top of the compression post not that it was attached all the way to the keel. Plus I didn't realize that the cabin roof was so thick. Rebedding it is. Sigh...another thing to add to "the list".

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willy
Captain

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USA
422 Posts

Response Posted - 01/20/2008 : 09:28:25

Wow...what restraint...not one choir joke!

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britinusa
Web Editor

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USA
5404 Posts

Response Posted - 01/20/2008 : 11:24:59

Tom, thanks, that is a problem on JD too. Your fix looks like a 20min project.

Can't tell from your pics. How did you remove any existing goop after pulling the compression post out the cabin top?

Paul

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Nautiduck
Master Marine Consultant

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USA
3704 Posts

Response Posted - 01/20/2008 : 11:36:27

Paul, I have removed goop (4200, 5200) with a sharp scraper and anti-bond. Takes a bit of elbow grease but the stuff does come off.

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Tom Potter
Master Marine Consultant

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USA
1913 Posts

Response Posted - 01/20/2008 : 17:03:03

It's 4200, comes off okay. I scraped it off using a razor blade, cleaned the wood area the same way. Little longer than 20 minutes

You want to make sure when you snug up the bolts you wait til the next day before you tighen them so you dont squeeze all the 4200 out and mess up your seal.

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Response Posted - 02/17/2008 : 20:33:24

I got the post out today, quite a chore getting it unstuck from the cabin top, two of us pulling up on a large screw driver through the mast pin holes couldn't budge it. Finally used a short length of 2x4 and gentle torque to free it. Once I got it to rotate, it was pretty easy to get out. Here's what it looked like underneath:

You can see where there was water intrusion at each bolt hole, as well as what looks like a piece of chipped fiberglass although I can't be too sure, I didn't look very closely at the time.

I had standing water in my centering post on the keel as well, and the core looks pretty wet, but no evident rot. I think I either got some ice heaving or simply wood expansion cracks in the roof. I watched for a while after I took the post out, and condensation formed where the wood is in the transverse support. Where it's hollow, no cracks, but where it is, there are several cracks. I don't think they're structural, but what's your opinion? I tried taking photos of them, but the flash kept overwhelming them. I'll try again tomorrow when I've got light to see with again. The sun was going down as I was trying to take the pictures.

I taped a jar of Dry-eeeze or whatever it's called to the bottom of the hole and taped the top of the jar to the top of the roof to keep any rain out. I'm hoping the drying agent will suck a bunch of water out of the hole, I'll see what it looks like tomorrow. If the nice weather holds for a while I'll leave it. Once it starts raining again (it is the PNW after all), I'll have to do a better job of waterproofing the hole.

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