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Straight Pipe Exhaust-No Muffler

Discussion in 'Technical Discussion' started by BLouder, Dec 22, 2011.

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  1. BLouder

    BLouder New Member

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    I was working in my engine room the other day and noticed one of my muffler was leaking at the seam. It had spilt where it was seamed together and not only was leaking water but exhaust fumes in to the engine room. We are preparing for a little trip and I thought how lucky I was that it didn't burst underway while on our trip. It could sink the boat. So I started thinking about what I could have done if that happened which leads me to my question.

    Could you run a correct diameter of ABS pipe in place of a muffler for an emergency fix? Obviousy I'm talking about wet exhaust with plenty of water flowing through it. How obnoxiously loud would it be? I run 871N DD .

    Anybody had one of these fiberglass mufflers fail on you under way?
  2. wickie

    wickie New Member

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    871's ?

    Very loud ;)
  3. dennismc

    dennismc Senior Member

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    If you must do a temp. thing, use schedule 80 PVC, higher temp rating than ABS, it will be noisy but ok for temp. operation.
  4. Marmot

    Marmot Senior Member

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    Good grief, if you have time to order Schedule 80 plastic pipe you have time to order a replacement muffler or at least a length of high temperature fiberglass exhaust tubing and appropriate hump connectors.

    This is still the era of overnight delivery.

    Sometimes doing it right is so much faster and maybe even cheaper than playing Rube Goldberg.
  5. RT46

    RT46 Senior Member

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    as an emergency get home solution ONLY

    you might be able to wrap the muffler tightly with some of that repair wrap for hoses, or use fiberglass or try to repair with emergency epoxy.

    that would be get home temp only.

    i would constantly check and monitor it and would be on the phone having a replacement muffler drop shipped to the dock waiting for me
  6. RER

    RER Senior Member

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    I agree with Marmot. Under what circumstances would you have onboard a right sized section of fire retardant wound glass-filament high temperature exhaust tube in anticipation of a muffler failure? You would be wiser to just replace the problem muffler.

    The engines don't need to be running for an exhaust leak to sink a boat. Where's your muffler located? The 48' Pacemaker was originally built with horizontal Vernatune type mufflers under the cockpit deck - at or partially below the waterline in which case a leak could still cause a sinking from sea water coming in through the exhaust port when the boat is at the dock.
  7. BLouder

    BLouder New Member

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    Well the muffler at the topic of discussion was replaced. I was thinking of an easy part to carry on board that would store easy and suffice in the event of an emergency. Strictly a part to get me home.

    I appreciate all your input
  8. BLouder

    BLouder New Member

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    You are correct, I have added two 6"ID rubber caps with clamps to the emergency kit to cap off the exhaust. These were added more with the thought of a hose failure.