[C320-list] Forespar Marelon Seacock replacement

[Scott Thompson]

I had a similar problem with the head sink seacock a few years ago. Mine 
was leaking through the handle when the seacock was open, and the screw 
was stripped.

I replaced mine with the 3/4" model (part no. 932143) and so I suspect 
that is the size you want since our hull numbers are very close.

I'm not sure they still make the particular one that you are replacing, 
but you can probably make the 932243 version work by re-orienting one of 
the hoses a bit.

BTW, I got good technical support from Randy Risvold at Forespar. The 
email address was salestechsupport at forespar.com and the phone number was 
(949)858-8820. I replaced just the seacock (and in fact not even the 
entire seacock since the black base glued to the backing block was 
reused). I used a "Seabung" to stop the inflow while replacing the 
seacock with no need to get in the water to plug from the outside.

Another factoid that may or may not be helpful: Randy wrote to me (after 
I had purchased the seacock) "Most likely all that needed to be replaced 
was the o-ring under the valve handle and not the entire valve." 
Possibly you could purchase just a replacement handle and o-ring from 
Forespar.

Scott Thompson, "Surprise" (1999, #653)


On 6/7/2019 1:59 PM, Daryl Hunt wrote:
> Hi All,
>
>     I got myself in a bit of a bind with a leaky head inlet seacock on 
> my '99 hull #660.  The handle had come off when I hauled last fall due 
> to a stripped screw.  I removed the 4 screws to remove the valve body 
> for better access. (I _now_ know Forespar says not to do this!)  I 
> replaced the small screw that secures the handle with a slightly 
> larger screw, reassembled and thought all was good.  When I launched, 
> I noticed a leak through the handle body when the valve is in the open 
> position!  When the lake warms up, I'll plug the hole from below and 
> attempt a fix. Assuming my best/only? path forward is to replace the 
> whole thru-hull, does anyone know where I can source this part?  It is 
> a double seacock that serves as both a head intake and shower sump 
> drain.  I couldn't find it on Catalina Direct website.  There are 
> similar valves on the Forespar website 
> (https://www.forespar.com/OEM-Valves.shtml) but it's not clear which 
> one to choose.   Has anyone replaced this thru-hull?  Any suggestions?
>
> Here are a couple photos:
>
> https://photos.app.goo.gl/xFVmMpcc2L3CTW2z9
>
> https://photos.app.goo.gl/AKg3oumRF32FMkVF8
>
-- 
Scott Thompson
Surprise, #653