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2002 Carver Voyager Volvo 74D Soot

Discussion in 'Carver Yacht' started by Cooktagious 2, May 16, 2008.

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  1. Cooktagious 2, May 16, 2008
    #1
    Cooktagious 2

    Cooktagious 2 New Member

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    Jacksonville, FL
    I am getting soot inside the salon, not bad but film. Any suggestions?
  2. AMG, May 17, 2008
    #2
    AMG

    AMG YF Moderator

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    If you mean that soot is entering from the outside exhausts, it usually comes if you have a backdoor open, creating an underpressure when underway. With a forward hatch or door open as well, this will go away. If your soot is coming from the engine room, you have a problem.

    I just saw this "backsmoke" on a vintage boat passing here on this cold Saturday:

    Attached Files:

  3. NYCAP123, May 17, 2008
    #3
    NYCAP123

    NYCAP123 Senior Member

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    If it's inside the salon you're breathing it. NG. How's your transom. If dirty close salon door. You may just have a smoker. If it's clean you probably have an exhaust leak. Check first by the turbos and the manifolds. Stay out of cabin while running until source is found.
    As pointed out by AMG remember that all boats suffer the "station wagon effect". You must keep ventilation running fore to aft (close salon door while running or exhaust will be sucked in).
    P.S. If you've got heavy black exhaust give me a PM.
  4. Cooktagious 2, May 17, 2008
    #4
    Cooktagious 2

    Cooktagious 2 New Member

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    Soot

    Thanks for the replies! Salon Door is closed, no exhast leaks, verified by Volvo, no soot in engine room or bilges. Transom does have soot, so must be getting in through vents somehow. Can't find where though.
    Thanks
  5. Fishtigua, May 17, 2008
    #5
    Fishtigua

    Fishtigua Senior Member

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    Black Breath

    Also check your crankcase breather and filter. Maybe if you pre-pressurise the engine room before firing-up (we used to wait for our ears to 'pop' before starting).

    Dave
  6. yachtbrokerguy, May 18, 2008
    #6
    yachtbrokerguy

    yachtbrokerguy Guest

    Are you running with your engine room blowers on? Many builders do not design enough ventilation for air gulping diesels, and having a exhaust blower pulling air from the engine room makes it worse. At idle speed it is good to have exhaust blowers on, but not at cruise for many boats.
    Check around the edges of floor hatches and where the bulkheads meet the floor. If you see dirt stains, the engines are pulling air in from places other than the vents.
    One remedy is to add a blower to bring air into the engine room. However some Carvers already have intake blowers, check yours and make sure which way the blow, in or out, and that they are functioning properly.
  7. Cooktagious 2, May 19, 2008
    #7
    Cooktagious 2

    Cooktagious 2 New Member

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    Thanks for the idea, my blowers run all the time.
  8. Bull Durham, Jun 25, 2011
    #8
    Bull Durham

    Bull Durham New Member

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    74D soot

    had the same problem. turned out to be a crack in the exhaust elbow. mechanic found it when under load at about 2000 rpm. took me about 2-3 days to clean the soot out of the interior of the boat.It was everywhere!
  9. jlplatts, Jun 25, 2011
    #9
    jlplatts

    jlplatts Member

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    We have a Carver 444 with Cummins. The fiberglass exhaust tube on the port engine was cracked. We did not get soot in the salon, but did get a little in the engine room. You may want to check the fiberglass tubes and be careful to not over tighten the clamps, that will crack the tube.