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thru-hull questions

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calden
Navigator

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USA
194 Posts

Initially Posted - 06/20/2010 : 10:49:26

Hey all:

The new owner guy here. Been working to clean up and fix up the boat, an '83. Have some questions about these things:

First one: Is this the kind of thru-hull that is needing to be replaced (i.e., the Catalina Direct "glass volcano" installation method)?

Depth or knotmeter - which? And also there is a tiny leakage coming from this one. A couple of tablespoons a day. Dangerous?

And... depth or knotmeter?

It was like a Summer in Edinburgh when I stepped the mast...

Thanks tons,
Carlos

S/V Mazama
1983 FK SR
#3682

Edited by - on

mlg3733
Navigator

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118 Posts

Response Posted - 06/20/2010 : 11:30:19

#1: Yes
#2: Depth
#3: Speed
#4: May look like a summer in Edinburgh, but the setting sure looks appealing.

Edited by - on

Dave5041
Former Mainsheet Editor

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USA
3758 Posts

Response Posted - 06/20/2010 : 17:25:20

It would be worth re-bedding the next time the boat is out of the water, but I wouldn't worry about it during this season. You may have a volcano, but it has a good seacock on top. I don't have volcanos, so I wasn't sure.

Edited by - on

dmpilc
Master Marine Consultant

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USA
4593 Posts

Response Posted - 06/21/2010 : 04:10:45

Looks like the seacock has been replaced by a PO. If it's not leaking and the handle turns easily, I would not worry about it. Deal with the leak on your next haulout, meanwhile keep a shop towel or big sponge down there to collect the water. If it gets too annoying, haul out early and address the problem.

Edited by - on

skrenz
Captain

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USA
351 Posts

Response Posted - 06/22/2010 : 12:31:23

Guys, what he pictures is NOT a seacock

Its some sort of ball valve put on top of the original glass volcano through hull. A seacock has a base that bolts to the hull. That's its reason for living, to supply a better mechanical bond to the hull. Looks like the PO had the original gate valve, usually bronze, replaced by this Marleon ball valve. Fixed the original problem but didn't address the underlying structural issue.

Edited by - on

redeye
Master Marine Consultant

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3476 Posts

Response Posted - 06/22/2010 : 12:43:20

Well.. I don't get it, seacock or ball valve.. My 84 had the exact same thing, and I replaced them ( or glassed them over ) and upon inspection they were fine. Granted, my boat was used very little, and was always in fresh water, but everyone said "oh you better get those replaced."

I would not want anything bumping them inside the boat, and as old as they are I'd rather have them replaced, but I don't look at them as failing.

Again, Salt Water may have a different outcome.

This was another thing that had me worried over nothing. Get it replaced, but don't worry yourself in the meantime.

IMHO

Edited by - on

calden
Navigator

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USA
194 Posts

Response Posted - 06/22/2010 : 18:27:48

Thanks all for the suggestions. I had our marina guy look them over and he said they're fine, but don't put an anchor in there. :)

I'm having him, sometime in the next month, haul the boat to paint the bottom, and he'll put in proper thru-hulls at that time.

Went on the maiden sail today with my family (delayed Father's Day.) Did not sink. Enjoyed the boat with a practically new main and extremely serviceable 150 genoa. The family pronounced it "just right" for the size.

Carlos

Edited by - calden on 06/22/2010 21:36:31

redeye
Master Marine Consultant

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3476 Posts

Response Posted - 06/23/2010 : 09:50:21

I just had a thought ( it happens ) ..

They are probably installing the through hull they removed off my boat onto another... The part is probably good, it is the skill of the person doing the install that makes it work properly.

Edited by - on

OJ
Master Marine Consultant

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USA
4382 Posts

Response Posted - 06/23/2010 : 13:43:39

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by calden
 . . . I had our marina guy look them over and he said they're fine . . . I'm having him . . . put in proper thru-hulls . . .
<hr height="1" noshade id="quote"></blockquote id="quote">Just in case your marina guy is a hack:

http://www.pbase.com/mainecruising/replacing_thruhulls

http://www.pbase.com/mainecruising/backing_blocks

Edited by - OJ on 06/23/2010 13:46:15

Happy D
Admiral

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921 Posts

Response Posted - 06/23/2010 : 17:20:33

I do not like the way he installed the seacock. He bolted the valve to the backing plate only? What's the purpose for that. The flange should be bolted through the hull.
I like the ones I put in. They will never corrode. They are bolted to the hull. They can be replaced without removing the king nut. What's not to like?
http://members.csinet.net/dhapp/th/through.hull.html

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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.