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What is (34)Bayliner marine core construction(34) ??-gctid802518

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    What is (34)Bayliner marine core construction(34) ??-gctid802518

    I was reading the manual for my 1988 Avanti 3450, it says that it has " exclusive Marine core construction"

    Does anyone know what that means? It is a registered trademark of bayliner and a patented process.

    I have been and was of the impression none of the bayliners under 45 feet have a cored hull. So do the 3450's have a cored hull or not. Does anyone know 100% the answer to this? (Actually seen and not just spewing others comments)

    I am having some issues with the hull gel coat on my boat if the hull is cored it would answer some questions I have otherwise I would just have to call it damaged get coat but could be a symptom of a more serious problem.

    I haven't cut any holes in my hull to find out i would prefer to avoid that.

    So is Marine core just a name or is it an actual cored hull?


    1989 Avanti 3450 Sunbridge
    twin 454's
    MV Mar-Y-Sol
    1979 Bayliner Conquest 3150 hardtop ocean express.
    Twin chevy 350's inboard
    Ben- Jamin
    spokane Washington

    #2
    "yachtman" post=802518 wrote:
    So is Marine core just a name or is it an actual cored hull?
    A very good question, yachtman! I look forward to an answer.
    "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

    Comment


      #3
      I've cut a couple of holes in my 3870. It's definitely different. Appears to be composite , definitely not wood, but less dense. Total thickness of about 3/4". Outside kin is 1/4" inside 1/8" core 3/8". Appears to be micoballoons and resin. Never seen anything like it.

      Comment


        #4
        I have always been under the assumption that the only cored parts of bayliner boats was the transom of course and the deck and cockpit sole. Nothing in the actual hull. Perhaps those are the parts they speak of when they say Marine core construction

        What I'm seeing on mine is a large area of gel coat spider cracking that looks like it had been pushed out. As like it water got in and maybe froze and expansion did damge. However where this is that is impossible from what I see on the inside. If there was a core and it was water soaked and froze I can see how that happened otherwise I'm stumped. I guess just grind it off and repair it but if it's cored that's a different story. The boat had been left in the water in a covered slip un used for many years. So much so that all the bottom paint is gone to the water line. As in nothing.

        I'll have to post a picture.
        1989 Avanti 3450 Sunbridge
        twin 454's
        MV Mar-Y-Sol
        1979 Bayliner Conquest 3150 hardtop ocean express.
        Twin chevy 350's inboard
        Ben- Jamin
        spokane Washington

        Comment


          #5
          I have a few different spot like this some are bigger and more extensive.




          I know they are kind of hard to see . It's worse than the picture appears



          I know this isn't cored hull but heat and bad gel coat so maybe it's poor manufacturing.
          1989 Avanti 3450 Sunbridge
          twin 454's
          MV Mar-Y-Sol
          1979 Bayliner Conquest 3150 hardtop ocean express.
          Twin chevy 350's inboard
          Ben- Jamin
          spokane Washington

          Comment


            #6
            Bayliner marine core construction...

            Gelcoat / Hybrid resin / Bonding coat / segmented strand mat / syntactic foam coring /segmented strand mat / 24 oz woven / segmented strand mat / 24 oz woven
            Joon, Kathy, Jaden & Tristan
            Uniflite 42 AC, DD 671N
            93 3058 sold
            92 2855 (day boat)
            91 Fourwinns 205 (lake boat)
            Longbranch WA
            Life is Good

            Comment


              #7
              Yachtman, the second pic: isn't that around the exhaust tube area at the transom?
              Dave
              Edmonds, WA
              "THE FIX"
              '93 2556
              Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

              The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
              Misc. projects thread
              https://www.baylinerownersclub.org/f...56-gctid789773

              Comment


                #8
                "Ruffryder" post=802549 wrote:
                Bayliner marine core construction...

                Gelcoat / Hybrid resin / Bonding coat / segmented strand mat / syntactic foam coring /segmented strand mat / 24 oz woven / segmented strand mat / 24 oz woven
                That sounds like a make up of the ccockpit sole I surely hope they didn't do that in the hull.

                I need to install a through hull transducer. I guess I'll find out. I hope I don't have to be the one to burst everyone's bubble that thought bayliners don't have cored hulls.
                1989 Avanti 3450 Sunbridge
                twin 454's
                MV Mar-Y-Sol
                1979 Bayliner Conquest 3150 hardtop ocean express.
                Twin chevy 350's inboard
                Ben- Jamin
                spokane Washington

                Comment


                  #9
                  most likely not, but shouldn't be any issues with Bayliner marine core construction

                  post #3, we all know 38XX series hull was constructed cored hull...
                  Joon, Kathy, Jaden & Tristan
                  Uniflite 42 AC, DD 671N
                  93 3058 sold
                  92 2855 (day boat)
                  91 Fourwinns 205 (lake boat)
                  Longbranch WA
                  Life is Good

                  Comment


                    #10
                    "builderdude" post=802550 wrote:
                    Yachtman, the second pic: isn't that around the exhaust tube area at the transom?
                    Yes it is. I imagine that is just heat damage or poor lay up technic from the factory. You know just one more thing to fix on a neglected boat. The other side is the same way.
                    1989 Avanti 3450 Sunbridge
                    twin 454's
                    MV Mar-Y-Sol
                    1979 Bayliner Conquest 3150 hardtop ocean express.
                    Twin chevy 350's inboard
                    Ben- Jamin
                    spokane Washington

                    Comment


                      #11
                      Marine core construction....


                      Northport NY

                      Comment


                        #12
                        "yachtman" post=802551 wrote:
                        That sounds like a make up of the ccockpit sole I surely hope they didn't do that in the hull.
                        Sure they did. They're nothing wrong with and if you're gonna try to plane a hull you need to be concerned with weight as well as economy of construction materials. It's completely acceptable in the industry to have foam hulls. Matter of fact, all of the bigger hulls were cut on a 5-axis router up here in Washington. They built ball the mold plugs in Arlington before they shut down. You could drive by and see 10 or so hull sides all clamshelled together getting ready to hit the road.
                        Custom CNC Design And Dash Panels

                        iBoatNW

                        1980 CHB Europa 42 Trawler- "Honey Badger"

                        Comment


                          #13
                          "Ruffryder" post=802549 wrote:
                          Bayliner marine core construction...

                          Gelcoat / Hybrid resin / Bonding coat / segmented strand mat / syntactic foam coring /segmented strand mat / 24 oz woven / segmented strand mat / 24 oz woven
                          Don't know much about Bayliner construction, but I know a lot about syntactic foam. Made of tiny glass balls bonded in an epoxy, that stuff is beyond tough. It is so crush resistant, Phil Nuytten used it in his 'Newtsuit' and 'Exosuit', and in his deep-diving "DeepWorker" submersibles.

                          [attachment]35065 wrote:
                          swimsuit.preview.jpg[/attachment]

                          If it's good enough to handle 1000 fsw, it would do very well in a Bayliner hull.
                          "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

                          Comment


                            #14
                            Well if the hull is cored and it has moisture in it and it did freeze and expand and did damage to the hull then that is a big problem. If it's still wet. That is a big problem. There is absolutely no way to dry it out.

                            That is really the question. If it's cored and got wet big problem if it's not cored well just crappy gel coat. It does seem solid though.
                            1989 Avanti 3450 Sunbridge
                            twin 454's
                            MV Mar-Y-Sol
                            1979 Bayliner Conquest 3150 hardtop ocean express.
                            Twin chevy 350's inboard
                            Ben- Jamin
                            spokane Washington

                            Comment


                              #15
                              Sounds like it's time to take a slice from the inside and find out what's actually in there.
                              Dave
                              Edmonds, WA
                              "THE FIX"
                              '93 2556
                              Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

                              The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
                              Misc. projects thread
                              https://www.baylinerownersclub.org/f...56-gctid789773

                              Comment

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