[C320-list] Head Vent

Sun Oct 21 04:42:18 PDT 2012

Sorry for the confusion. I put the inspection port in the plywood cover over the transmission, shaft and stuffing box, and thru hulls not through the engine cover. I put in in just behind the engine cover and close to where the mattresses meet. That way I can just lift the two mattresses together, pop the inspection port (like the one over the emergency tiller post), reach in and work the thru hulls and check the shaft temp, etc. The sheets on the births usually stay put. I also put in a AC burp valve in that space since if I forget to close the thru hull when sailing I get a nice air lock in the AC. I may actually put one in the side of the actual engine cover to make it easier to quickly check the oil but will ponder that a little more because of insulation and noise. That has been described before on the list and there may be a picture of it on the website. 

Hope that is clearer. 

Jim Brown

________________________________
 From: "wflowe3 at aim.com" <wflowe3 at aim.com>
To: C320-List at Catalina320.com 
Sent: Friday, October 19, 2012 10:26 AM
Subject: Re: [C320-list] Head Vent

Can you describe your inspection port in the aft engine cover?  I don't close the seacocks for the engine and AC intakes during the season because I have to remove the bedding and half the mattress to get to them.
Thanks
Bill #1146

-----Original Message-----
From: jim brown <jbrown5093 at yahoo.com>
To: C320-List <C320-List at Catalina320.com>
Sent: Thu, Oct 18, 2012 6:27 pm
Subject: Re: [C320-list] Head Vent

Thanks very much for the tips. I think my hull, 978, does have the thru hull 
forward as you describe since I can't see how I can have arms long enough to 
reach it through the hanging locker as described in previous posts. Mine exits 
forward of the medicine cabinet at least judging from the outside view. I think 
that the inspection port must be an after marked modification or just a lucky 
addition to a few hulls by the factory. I can't find one on my boat but it 
sounds like a good idea. I just added an inspection port to the wood panel over 
the aft engine and shaft opening-makes getting at the air conditioner and engine 
thru hulls pretty easy without tearing the whole birth apart. Thanks again for 
all the help. 

Jim Brown

________________________________
From: Denny Browne <dennybrowne at verizon.net>
To: C320-List at Catalina320.com 
Sent: Thursday, October 18, 2012 4:10 PM
Subject: Re: [C320-list] Head Vent

I found a Rule 90-degree through hull on the shelf at West Marine, of all
places. The 5/8" is West Marine # 336230 (Rule # 62) and the 3/4" is WM#
396293 (Rule #62). Page 517 in the 2012 catalog. Took me a couple of hours
to figure it all out but head odor is gone. I also discovered (afterward!)
that there's an inspection port behind the toilet seat that makes it very
easy to reach into the space behind the wall and manipulate the hoses
without trying to crawl into the hanging locker.

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Henderson,
David
Sent: Thursday, October 18, 2012 12:48 PM
To: c320-list at lists.catalina320.com
Subject: Re: [C320-list] Head Vent

Jim, A tip for you and anyone attempting this project.  I did it last spring
and have had that same positive results that Jeff and others report.
However, my hull #1049 is I believe a couple of hundred hulls after Jeff's,
and consequently I found a structural difference that presented a key
complication. The factory vent goes through my hull at a point where there
is only about two inches of space between the inside of the hull and an
interior structural element which I think is just part of the head forward
bulkhead.  The factory vent does a 90 degree bend so it just fit into that
tight space; but after I got the medicine cabinet out and played with it, I
discovered that there was no way that I could get a new marleon thru hull
with hose attached into that same space.  The barb of the thru hull sticks
straight out for about two inches or so and there just wasn't enough room to
get the hose onto it
-  even if I tried to shorten the barb.  Not even close.  And I could not
find a thru hull with a 90 degree bend anywhere.  So, the solution, although
far from ideal, was to leave the factory vent in place and simply plug it
permanently with some silicone caulk.  I then installed the new thru hull
about four or five inches aft of the existing vent, where there was no
structural element in the way. 

So now I have two holes in my starboard side, one occupied by the dead
factory vent.  I was not happy about this result at first, but it really
doesn't look odd, and I am sure I am the only one who would ever notice.
Most importantly, as I said above, the head odor is completely gone.

In retrospect, I'll bet that the factory vent on Jeff's boat was installed
further aft than mine, and that's why he didn't encounter this issue. 

Good luck,

Dave Henderson

Dottie B.  # 1049 (for sale  -  see listing on Yachtworld:
http://www.yachtworld.com/boats/2005/Catalina-320-2489149/Manchester/MA/
United-States) 

----------------------------------------------------------------------

Message: 1
Date: Wed, 17 Oct 2012 15:32:42 -0400
From: Jeff Hare <catalina at thehares.com>
To: "C320-List at Catalina320.com" <C320-List at Catalina320.com>
Subject: Re: [C320-list] Head vent
Message-ID: <EA4650BF-9D5D-4D86-BD34-5C3DBD9E46F6 at thehares.com>
Content-Type: text/plain;    charset=us-ascii

No, the holding tank already has the correct fitting.  The size of hose used
there is fine.  The factory vent takes a much smaller hose and that is part
of the problem.  Be sure to use a little silicone around the new vent to
ensure that no gasses can sneak back in around the new vent.

Zero holding tank smell all season this year.  Aft closet is back to
fiberglass and cedar smell again.  No complaints from the boss at all this
year. :)

Jeff

On Oct 17, 2012, at 10:03 AM, jim brown <jbrown5093 at yahoo.com> wrote:

> Sorry to bring this up again but I can't find Jeff Hare's nice piece
on replacing the head vent on the website. I know the parts needed for the
hose and the thru hull fitting but can't remember if the fitting on the
holding tank has to be replaced with a larger diameter one or not.
Can anyone point me in the right direction or supply a part number for that
piece if needed? Thanks. Should make a good early winter project and allow
me to practice my Navy language. 
> 
> 
> Jim Brown
> 
> 
> 
> 
> ________________________________

------------------------------

Message: 2
Date: Wed, 17 Oct 2012 15:34:08 -0400
From: William <wmo48 at yahoo.com>
To: "C320-List at Catalina320.com" <C320-List at Catalina320.com>
Subject: Re: [C320-list] Head vent
Message-ID: <DEED707C-4421-4F62-A20A-BEC2FB6C6D9F at yahoo.com>
Content-Type: text/plain;    charset=us-ascii

I used the same diameter hose and did not replace the holding tank fitting.
Mike Ott
'AmandaLu'
#508

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