[C320-list] PYI PSS help

[Jeff Church]

Chris,

The fitting exits the pressure side of the heat exchanger so there is a bit of seawater flowing thru the hose. I don't see how that would present a problem. The positive pressure prevents any air from accumulating in the seal, and the very small diameter of the barbed fitting prevents any significant volume of water from being diverted from the cooling system. The technician at my CY dealer suggested that I plumb the PSS this way. He said that CY supplied a similar kit for some models after they had a problem with the way they originally vented the seal when they started installing them as standard equipment.

JeffC 

  ----- Original Message ----- 
  From: crashley at gte.net 
  To: C320-List at Catalina320.com 
  Sent: Tuesday, April 29, 2008 7:57 AM
  Subject: Re: [C320-list] PYI PSS help


  Jeff,

  That's an elegant solution but are you sure there isn't any positive 
  pressure in the heat exhanger that would force cooling water back thru the 
  PSS? Not sure it would matter but it might be a concern. I simply routed and 
  clamped a piece of 3/8" plastic tubing from the PSS barb to just below the 
  underside of the aft engine cover. It's several inches above the water line, 
  near the center of the boat and I've never seen any evidence that water 
  comes out of it.

  CRA
  Rosebud #882


  ----- Original Message ----- 
  From: "Jeff Church" <jjemail at comcast.net>
  To: <C320-List at Catalina320.com>
  Sent: Monday, April 28, 2008 4:53 PM
  Subject: Re: [C320-list] PYI PSS help


  Joe,

  I removed the drain petcock at the aft end of the exhaust manifold heat 
  exchanger and replaced it with a brass barbed fitting. A hose connects that 
  to the barbed fitting on the PSS. The hole in the heat exchanger has metric 
  threads that are not quite identical to 1/4" NPT so I ran a 1/4" NPT tap 
  thru them (I think it was 1/4", but it was a few years ago) and then the 
  barbed fitting threaded correctly.

  Here is a pic from the 320 site:
  http://www.catalina320.com/gallery/idlewildprojects/IMG_0446

  Good luck,

  JeffC
    ----- Original Message ----- 
    From: Joseph A Tamucci
    To: C320 LIST POST
    Sent: Monday, April 28, 2008 3:42 PM
    Subject: [C320-list] PYI PSS help


    I recently installed the replacement to the PYI PSS shaft seal that is
    vented. It requires that the vent hose be installed 2 ft above the
    watereline. It is not obvious to me where I can run the vent hose to 
  achieve
    the necessary height. Any suggestions would be welcomed.

    Thanks,

    Joe Tamucci #619