[C320-list] Marelon seacock problem

[Scott Thompson]

Actually the one I have looks more like this...

https://www.fisheriessupply.com/forespar-marelon-full-flow-seacock-flush-thru-hull-x-ball-valve-x-hose-barb-oem-932143

  In particular, mine has a straight-through hose barb and a flush (not 
mushroom) thruhull. (The latter probably doesn't matter for this 
project.) The main uncertainty I have is about the size. I called 
Catalina today and they said it could be one of several different sizes. 
Catalina Direct also had no idea as to the correct size. The boat is on 
a mooring and I can't get out to her for a few days so will hope for the 
best. In the meantime I'm guessing that 3/4" is the right size based on 
email from David Prudden this morning.

The boat was just launched 10 days ago so the bottom should be in pretty 
good shape. I don't need a perfect seal -- just enough to let me do the 
installation.

Seabung comes in a package of two different sizes and they say that the 
smaller one is good for a 3/4" thruhull. We will see! It's expensive but 
cheaper than a diver and the water is still pretty cold so I'm not keen 
about going overboard myself.


On 5/15/2017 6:50 PM, Jeff Hare wrote:
> Yuck.  You need the 16 added to the end of that link below.  It got line
> wrapped!
>
> Or you can just go here...   http://tinyurl.com/thruhull
>
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
> Of Jeff Hare
> Sent: Monday, May 15, 2017 6:48 PM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Marelon seacock problem
>
> I assume that the bottom of your boat is nice and clean around the
> thru-hull, right?  Otherwise, seabung won't seal very well in my opinion.  I
> think it'll also make it a more difficult to disassemble and replace the
> valve with that bung having the big loop on the end (unless that loop will
> easily fit through the ball valve hole).
>
> If you have this valve:
> http://www.defender.com/product.jsp?path=-1%7C51%7C2234277%7C2234282&id=1993
> 16
>
> Then once you plug the bottom using the built in plug, you'll unscrew the
> four screws in the top of the valve, then the top two sections of the valve
> will come apart.  The top section is the tailpiece where the hose connects,
> the middle section is the one containing the handle and the ball valve.
>
> You'll pop a new middle section and top section in place with the new
> gaskets you got from the new one and install the 4 screws.  Then go on deck
> and pull the string tied to the plug to remove it and you're done.
>
> -Jeff
>
> -----Original Message-----
> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On Behalf
> Of Scott Thompson
> Sent: Monday, May 15, 2017 1:08 PM
> To: C320-List at Catalina320.com
> Subject: Re: [C320-list] Marelon seacock problem
>
> I can find this part and the Seabung at Fisheries Supply in Seattle with
> two-day shipping and decent prices. I can't find either one at Catalina
> Direct.
>
> But can anyone confirm that the appropriate size is 3/4"? They seem to have
> a range of sizes. This is for the sink drain in the head.
>
>
> On 5/15/2017 6:14 AM, David Prudden wrote:
>> Scott,
>> I had the same problem a year ago.
>>
>> The thru-hull part is a forespar #932143
>>
>> Contact Randy there about it
>> randall at forespar.com
>>
>> David Prudden
>> #787
>>
>> Sent from my iPhone
>>
>>> On May 14, 2017, at 8:40 PM, Jeff Hare <Catalina at thehares.com> wrote:
>>>
>>> Scott,
>>>
>>> That's a problem.  If I were you, I'd consider wrapping rescue tape
> around
>>> that handle and make arrangements to get the plug inserted into the
>>> thru-hull from outside so that you can replace the ball valve layer
>>> of
> the
>>> thru-hull.  Be sure to attach a string to the loop on the plug so you
>>> can remove it from deck without a second dive.
>>>
>>> The reason is that if that handle screw is stripped such that it
>>> doesn't hold the handle in place, the water pressure will pop the
>>> handle off, tossing the o-ring and washers somewhere turning that
>>> drip into a substantial leak.  I think it will be enough of a gusher
>>> that you won't
> be
>>> able to get the screw, o-ring and washers back in place (assuming you
> could
>>> even find them again) without the plug installed in the outside.
>>>
>>> Don't let that go...
>>>
>>> -Jeff Hare
>>> #809
>>>
>>>
>>> -----Original Message-----
>>> From: C320-list [mailto:c320-list-bounces at lists.catalina320.com] On
> Behalf
>>> Of Scott Thompson
>>> Sent: Saturday, May 13, 2017 4:41 PM
>>> To: C320-List at Catalina320.com
>>> Subject: [C320-list] Marelon seacock problem
>>>
>>> I noticed a small leak that seems to be coming from the handle of a
> seacock
>>> when it is open. When I try to tighten the screw through the handle
>>> it
> just
>>> spins. Advice welcome!
>>>
>>> Scott Thompson
>>> Surprise #653(1999)
>>>
>>>