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Reducing engine noise-gctid803816

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    Reducing engine noise-gctid803816

    Any suggestions on engine cover insulation.What is there now is 394 mill thick.Would like around 1"thick.The boat has an engine box not a hatch.

    #2
    "360 mafia" post=803816 wrote:
    Any suggestions on engine cover insulation.What is there now is 394 mill thick.Would like around 1"thick.The boat has an engine box not a hatch.
    This is what I used. Works great! Easy to cut and apply too.

    https://www.amazon.com/gp/product/B0...oop_bw_c_x_1_w

    I see the price came down. Lucky you!
    "B on D C", is a 1989 2459 Trophy Offshore HT, OMC 5.7L, Cobra OD, Yamaha 15hp kicker. Lots of toys! I'm no mechanic, just a blue water sailer and woodworker who loves deep sea fishing.
    MMSI: 367637220
    HAM: KE7TTR
    TDI tech diver
    BoD Puget Sound Anglers North Olympic Peninsula Chapter
    Kevin

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      #3
      There is an outfit in MA called Soundown that has a good variety of marine sound absorbing materials. There is also a company in Tigard, Oregon that manufactures sound absorbing materials but I can't remember the name. If it comes to me I'll edit this post

      Greg

      It is called Composite Barriers / Sound Technology
      Newport, Oregon
      South Beach Marina
      1986 3270 with twin 110 HP Hino diesels. Name of boat "Mr. Darcy"
      Past work history: Prototyping, tooling, and repair for Reinell,. General fiberglass boat repair starting in 1976.
      Also worked as heavy equipment mechanic, and machinery mechanic for over 30 years.

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        #4
        As well as choosing a good sound deadening material (something with lead in it works well BTW), consider also any openings to the engine which may transmit noise. Our old boat had a Greymarine flathead six which was actually very quiet what with the valve train buried within the engine block.

        We replaced the Grey marine with a 4 cylinder Ford diesel Osco conversion and it was LOUD to say the least. Adding tons of noise reducing foam help significantly, but plugging holes that allowed sound to filter out of the bilge helped reduce the sound considerably. Had we done the same with the Greymarine, it would have been nearly silent.
        2007 Discovery 246
        300mpi BIII
        Welcome island Lake Superior

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          #5
          Add seals to the edges of the engine box and any other hatches to that area if it does not already have some. It is amazing how much that helps.

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