Exhaust Systems and Hot Section Specs

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  • ndutton
    Afourian MVP
    • May 2009
    • 9601
    #1

    Exhaust Systems and Hot Section Specs

    Okay, I'll start this category off by posting two of my favorite pdf's on exhaust systems. One has drawings from Sparkman and Stephens on muffler types, a great reference on the subject, the other covers the USCG specifications on marine exhaust systems.

    For those contributing to this forum category, you're encouraged to provide as many descriptive tags as possible to make future searches easier.
    Attached Files
    Neil
    1977 Catalina 30
    San Pedro, California
    prior boats 1987 Westsail 32, 1970 Catalina 22
    Had my hands in a few others
    Tags: hot section, muffler, standpipe, waterlift
  • Gordo
    Senior Member
    • Jul 2011
    • 55
    #2
    I've been trying to see that water lift pic for weeks, but I guess it's that bad quality wise. Does anyone have the origonal they scanned?
    My "other" Boat:

    sigpic

    Comment

    • ndutton
      Afourian MVP
      • May 2009
      • 9601
      #3
      Here are the originals I have such as they are. I've included a three stage functional drawing of a waterlift I stumbled across too.

      Really sorry for the quality but it is what it is.

      Click image for larger version Name: Waterlift detail.jpg Views: 3 Size: 39.3 KB ID: 191049 Click image for larger version Name: Waterlift elevation.jpg Views: 3 Size: 39.5 KB ID: 191050

      Click image for larger version Name: Waterlift function.jpg Views: 3 Size: 72.7 KB ID: 191051
      Last edited by ndutton; 05-10-2012, 06:29 AM.
      Neil
      1977 Catalina 30
      San Pedro, California
      prior boats 1987 Westsail 32, 1970 Catalina 22
      Had my hands in a few others

      Comment

      • ndutton
        Afourian MVP
        • May 2009
        • 9601
        #4
        Here's another waterlift system drawing
        Click image for larger version Name: Waterlift exhaust system.jpg Views: 2 Size: 43.3 KB ID: 194117
        Neil
        1977 Catalina 30
        San Pedro, California
        prior boats 1987 Westsail 32, 1970 Catalina 22
        Had my hands in a few others

        Comment

        • romantic comedy
          Afourian MVP
          • May 2007
          • 1912
          #5
          There are volume considerations. was that included in the diagrams and specs?
          They are not loading for me tonight.

          One side cant be more volume then the other side...

          Comment

          • ndutton
            Afourian MVP
            • May 2009
            • 9601
            #6
            One side can't be more volume than the other side...
            Yeah, actually it can. The Catalina 30 has approximately 2 feet of exhaust hot section before the waterlift and around 18-22 feet after.

            What really matters is the waterlift's capacity must be greater than the volume of the downstream exhaust hose from the waterlift to the top of the hump. It has to contain any backwash on shutdown.
            Neil
            1977 Catalina 30
            San Pedro, California
            prior boats 1987 Westsail 32, 1970 Catalina 22
            Had my hands in a few others

            Comment

            • romantic comedy
              Afourian MVP
              • May 2007
              • 1912
              #7
              Right Neal. That is what I was getting at.

              Comment

              • ndutton
                Afourian MVP
                • May 2009
                • 9601
                #8
                Originally posted by romantic comedy View Post
                Right Neal. That is what I was getting at.
                Sorry RC, I apparently misunderstood your post.
                Neil
                1977 Catalina 30
                San Pedro, California
                prior boats 1987 Westsail 32, 1970 Catalina 22
                Had my hands in a few others

                Comment

                • Skywalker
                  • Jan 2012
                  • 621
                  #9
                  A little help please.

                  Doing the rebuild. Black pipe, flange, water injector port, everything fits nicely.

                  However, the water hose is 3/4. How have you guys chosen to reduce the water hose to fit the injection barb?

                  Is the barb pipe thread? I went to te hardware store tonight, and nothing threaded on that well.

                  I was thinking of adapting the port, but the store was out of what I needed. Off to a different store tomorrow.

                  Did some of you nevk down the hose?

                  Thanks or he help.

                  Comment

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