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Exhaust redo

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  • Exhaust redo

    Those of you who have heard my 26 know that I need to do something about the noise level. When it comes out in a couple of months for general maintenance, I need to redo the exhaust but, I have no idea how to quiet it down. I have the long fiberglass mufflers that do nothing. What do y'all 26' owners do with yours? How does your 26'er have the exhaust setup?
    1988 26' cuddy
    1975 20' open
    31 Grand Slam
    16' Sandpiper
    14' Certified Fiberglass

  • #2
    In the beginning of the season, I put 4" PVC down elbows on the ends of the hooters. I feel it made a considerable difference, especially considering the price.

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    • #3
      Do you think the hooters help?
      1988 26' cuddy
      1975 20' open
      31 Grand Slam
      16' Sandpiper
      14' Certified Fiberglass

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      • #4
        The elbows did the most for me too. I have Rex flappered through hulls and the rubber mufflers but the ells did by far the most.
        Atlantic City, NJ
        1982 Cuddy, Rebuilt 351 .060 rings, Edelbrock carb

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        • #5
          Sound down is talked about as being very good too.
          Atlantic City, NJ
          1982 Cuddy, Rebuilt 351 .060 rings, Edelbrock carb

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          • #6
            Engine box is soundown, 45* on the exhaust thru hulls. Nothing works. Exhaust noise not engine noise as far as I can determine.
            1988 26' cuddy
            1975 20' open
            31 Grand Slam
            16' Sandpiper
            14' Certified Fiberglass

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            • #7
              I have 90 degree ells that are just above the water while on plan. I cut a small vee on the trailing edge to try and prevent vacuum
              Atlantic City, NJ
              1982 Cuddy, Rebuilt 351 .060 rings, Edelbrock carb

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              • #8
                Surge chambers, exhaust hose laid low in the belly and 90-degree turndowns. The surge chambers, low hose, and the hoot-a-daps were a winner on the Mack.

                regards Holty

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                • #9
                  Surge chambers and hooters with the Holty adaptation, on the list. Hose lying in the bilge will stay full of water and act as a muffler?
                  1988 26' cuddy
                  1975 20' open
                  31 Grand Slam
                  16' Sandpiper
                  14' Certified Fiberglass

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                  • #10
                    Yes, at lower rpm's the water will help muffle the exhaust.

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                    • #11
                      Mine's a 22', but I wrapped my exhaust hoses with 2" insulation, then 3" fiberglass tape. Held the fiberglass tape in place with zip-ties; then painted the whole thing with deck adhesive. It holds together great. I don't have before/after data, but I think it helped the noise at least a little.
                      Clint Smith
                      Idaville, Oregon
                      '93 22' Warrior (Walkaround)

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                      • #12
                        I love the sound of my Mercruiser Horizon at cruise!

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                        • #13
                          Originally posted by Pequod View Post
                          I love the sound of my Mercruiser Horizon at cruise!
                          Gotta love the sound BUT, mine is a little over the top.
                          1988 26' cuddy
                          1975 20' open
                          31 Grand Slam
                          16' Sandpiper
                          14' Certified Fiberglass

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                          • #14
                            Found these thru hulls today. I think they will help with the noise. What y'all think? Click image for larger version

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                            1988 26' cuddy
                            1975 20' open
                            31 Grand Slam
                            16' Sandpiper
                            14' Certified Fiberglass

                            Comment


                            • #15
                              Not sure what to compare the noise to, but we have those through hulls on our 26 open. The boat is not overly noisy unless we are running hard, then you have both the engine and wind noise. At cruising speed it’s not bad. The engine is a 351W with rubber hose off the elbows leading to fiberglass tubes then switching back to rubber to attach to the through hulls in your photo.
                              Last edited by Mako2; 10-19-2019, 04:32 PM.
                              1990 26’ open 351W

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