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Exhaust System

Discussion in 'Tartan' started by Simon Sexton, Dec 6, 2018 at 8:36 AM. Add this thread to a FAQ

  1. Simon Sexton

    Simon Sexton

    Joined Nov 1, 2017
    348 posts, 142 likes
    Catalina 25 Tall Rig
    Valiant US Watergate Marina, Kemah, TX
    Hey Everyone,

    Good morning! I spoke with our Skipper this morning, and he asked me if I knew anything about the exhaust layout of the Atomic 4 on our Ship's T30; she has been poorly powered by an outboard recently as the engine has been replaced. Skipper had a specialist working on it, but the elderly mechanic suffered a sudden stroke and has been hospitalized for the last year. Because if this unfortunate event, Flyin' Anne's engine restoration has come to a standstill. For now, the only glimmer of hope is Skipper's mechanical abilities; he worked for years as an engineer for Nasa, so if he can get a hold of some information, he'll surely be able to figure something out. The main issue is the exhaust layout. Neither one of us can figure it out for our lives, and are worried about rebuilding it incorrectly. If anyone has any pictures or knowledge of how the exhaust system is laid out, it would be very much help. Thanks!

    God Bless,

  2. LeslieTroyer


    Joined May 20, 2016
    1,990 posts, 753 likes
    Catalina 36 MK1
    US Everett, WA
    A4’s are a simple engine. Look at Moyer Marine for everything A4.

    jssailem and Simon Sexton like this.
  3. Tom J

    Tom J

    Joined Sep 30, 2008
    1,009 posts, 39 likes
    Catalina 310
    US Quincy, MA
    A few years ago, I was helping a friend convert a sailboat from Atomic 4 power to Yanmar diesel. The Atomic 4 had a dry exhaust system, and the Yanmar has a wet system. If you are restoring the Atomic 4, you will need to run insulated tubing to the muffler, and then to the exhaust outlet. If you are converting to a diesel. you will need an exhaust riser for the engine with raw water to the riser, exhaust hose to a wet muffler, and a loop of hose to the exhaust outlet.

    Simon Sexton likes this.
  4. LeslieTroyer


    Joined May 20, 2016
    1,990 posts, 753 likes
    Catalina 36 MK1
    US Everett, WA
    I almost positive my dads Santana 27 with A4 was a wet exhaust. At least we always checked that water was coming out with the exhaust

    Simon Sexton and jssailem like this.

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