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Cabo 40 engine noise CAT C12s

Discussion in 'Cabo Yacht' started by Capt Maritime, Jul 5, 2024.

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  1. Capt Maritime, Jul 5, 2024
    #1
    Capt Maritime

    Capt Maritime Member

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    I had some guests out on my Cabo 40 during the 4th of July holiday and a couple of folks thought the engines were loud. To me there is nothing better than sitting at the helm on the bridge and listening to the C12s at cruise. I have to admit it is a bit louder on the bridge when compared to my previous boats.

    Any recommendations to reduce engine noise on the bridge of a Cabo 40?

    Cabo 40 C12s aft.jpg
  2. DOCKMASTER, Jul 5, 2024
    #2
    DOCKMASTER

    DOCKMASTER Senior Member

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    Ear plugs. :)
  3. Capt Ralph, Jul 5, 2024
    #3
    Capt Ralph

    Capt Ralph Senior Member

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    You may have to do some research as to what you are hearing or feeling or some of both.
    Exhaust noise? Mechanical engine noise? Turbo scream? Air rushing? Vibrations from the boat? Running gear? Water on the hull sides? Water past the transom?

    One of our members reported these kids helped a lot.
    https://soundown.com/

    My first step; Stick your head out from under that hard top, forward or to the sides, sound different?
  4. Capt Maritime, Jul 7, 2024
    #4
    Capt Maritime

    Capt Maritime Member

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    It’s exhaust noise.
  5. Capt J, Jul 7, 2024
    #5
    Capt J

    Capt J Senior Member

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    CATS are traditionally loud. You may need add mufflers or open part of your enclosure so you're not sucking the noise back towards you at cruise.
  6. Capt Ralph, Jul 7, 2024
    #6
    Capt Ralph

    Capt Ralph Senior Member

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    Midasize
  7. PacBlue, Jul 8, 2024
    #7
    PacBlue

    PacBlue Senior Member

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    Talk to Bert Browning at Centek, they have done a decent job in knocking down the noise on the CAT C-18's.
  8. Capt Ralph, Jul 8, 2024
    #8
    Capt Ralph

    Capt Ralph Senior Member

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    I have to wonder, Where there mufflers ever in the boat?
    Removed or under sized from a re-power?

    And glass & rubber mufflers do fail.
  9. Capt J, Jul 8, 2024
    #9
    Capt J

    Capt J Senior Member

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    I can't remember. However the Cat's are FAR noisier in a boat like a CABO than equivalent MAN or MTU's. A lot more harmonic noise in the engine room and a lot more exhaust noise, on the same exact boat otherwise.
  10. Capt Maritime, Jul 13, 2024
    #10
    Capt Maritime

    Capt Maritime Member

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    Yes there are factory in line fiberglass mufflers outboard of each in deck fish box. The exhaust sound is music to my ears, however as Capt Ralph indicated, the CAT's are far noisier. I did have all the curtains open on the fly bridge so that should have reduced any station wagon effect on the bridge. Strange thing - I have noticed is the exhaust noise is less noticeable from the cockpit vs the flybridge when underway at cruise speed. I have noticed some of the Cabo 40's have a hinged floor board on the bridge access ladder. Additionally I do not have an aft curtain on the flybridge enclosure as that would possibly restrict visibility when fishing.