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 Catalina/Capri 25/250 Sailor's Forums
 Catalina 250 Specific Forum
 Holding Tank		  New Topic  Topic Locked
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RTripp4830
Deckhand

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USA
3 Posts
Initially Posted - 08/07/2011 :  10:27:56  Show Profile
I bought my Catalina 250K back in 2003. It came with a marine head and holding tank, but the owners manual had pages referring to a "portapotty". In looking at the holding tank, it looks to be 5-6 gallons. Can anyone tell me what it actually is?
Bob Tripp
Tripp Time
2003 #678
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frog0911
Master Marine Consultant

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USA
1349 Posts
Response Posted - 08/08/2011 :  11:30:37  Show Profile
My '04 has a 12 gallon holding tank.
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 08/08/2011 :  12:26:32  Show Profile
Portapotti is the standard equipment - that's why it's in your manual. Marine head is an upgrade, either installed by dealer or (maybe) factory(?)

A PO told me that my boat used to have a 12 gallon holding tank, but it rubbed against the Edson steering mechanism so he downgraded it to 6 gallons. Frog's 12 gal seems to fit OK, though. So yours might be 12 or 6 gallon. I suggest you get a ruler, measure it, and do the arithmetic. 1 gallon = 231 cubic inches.

I'm not at all fond of this position for the holding tank. The dead volume in the sanitary hose is >1 gallon, so you need an excessive amount of water to get a thorough flush, and the tank fills up very fast. Someone else here has a design that places the tank right behind the wet locker - much less dead volume there.
Edited by - TakeFive on 08/08/2011 12:29:30
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frog0911
Master Marine Consultant

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USA
1349 Posts
Response Posted - 08/08/2011 :  19:34:06  Show Profile
With the Edison original pull/pull system there was not a problem with it touching the tank. However the steering was so sensitive that and minor movement caused major bow swings. In other words the rudder could be move from lock port to lock starboard with just one full turn of the wheel. The fix was to install Aryln's wire system which gave a 2 1/2 turns lock to lock. This installation was impossible with the tank installed height. The tank was lowered by removing an inch of the front and rear base. This gave me 1/2 inch of space below the pulley. As you can see from the last picture, the cable does not ride properly thru the pulley. This was fixed by adding washers until the steering arm was level with the pulley. I don't have a picture of the finished install, but will get one tomorrow.









Edited by - frog0911 on 08/09/2011 07:41:15
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TakeFive
Master Marine Consultant

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2272 Posts
Response Posted - 08/09/2011 :  17:14:34  Show Profile
I think the <u>true</u> original Edson system was a push-pull system which Edson later replaced with their pull-pull cable system (which is what I have). You are correct that full port to full starboard is a little over one turn, but I actually like the "helm feel" that this gives me. I've always been concerned that the increased purchase of the pulley system could cause one to over-stress the fragile rudder assembly without realizing it. Just in the past year I've read here about two rudders that failed under the pintles, and a couple failures and/or loosening of the pintle or gudgeon hardware. (None of these were ever alleged to be caused by any of the steering systems.) But for me personally, I want to feel the stresses in the wheel instead of hiding them with mechanical leverage. YMMV
Edited by - TakeFive on 08/09/2011 17:18:14
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Arlyn Stewart
Master Marine Consultant

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USA
2980 Posts
Response Posted - 08/17/2011 :  05:23:52  Show Profile  Visit Arlyn Stewart's Homepage
Rick... Yep, a Todd 13 gal holding tank location just aft of the wet locker has worked well.

http://pages.suddenlink.net/arlyn/sailing/holdingtank.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.