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4087 (with 6BTA) exhaust risers-gctid389396

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    4087 (with 6BTA) exhaust risers-gctid389396

    Just curious-noticed that our engines have riser cans coming off the turbos like this (photos are from National Marine Exhaust):



    There are also a pair of large mufflers on either side of the lazarette.

    I saw another 4087 with the same engines as mine equipped with exhaust pipes coming off the turbo that looked more like this:



    What are the differences/advantages between the 2? Are they interchangeable?

    #2
    Both styles look like they built by National Marine Exhaust. I'd shoot Scott an email if he doesn't respond. My guess would be less restriction in the second unit. Rick

    [email protected]
    Rick
    2002, 3788

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      #3
      Pau,Do you have an actual picture of the ones installed in your boat? I was just on a 4087 at the Rendezvous on Saturday and it had the dry riser with the blanket on both sides not the can style. The Port side riser heads straight aft into a bronze 90* el and the Stbd. side riser heads outboard. Non of the parts catalogs show a "Can" style exhaust stock on that boat. Rick is correct that the dry riser will have less back pressure. There should be a tag on your part with our name on it and if you send me the 4 digit tag number I can look it up and see who, what and when it was origninally made. This illustration shows what it should look like.

      [img]/media/kunena/attachments/vb/692976=28445-4087exhaust.jpg[/img]

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        #4
        The tag on the port side can is from National Marine Exhaust: 2873 is stamped onto the tag.

        Have a pic posted shortly...

        Comment


          #5
          I have the exact same looking can type risers on my 4788

          They're new with the repower, (and they wern't cheap )

          KEVIN SANDERS
          4788 LISAS WAY - SEWARD ALASKA
          www.transferswitch4less.com

          where are we right now?

          https://maps.findmespot.com/s/36S4

          Comment


            #6
            Here is a photo of the original stock part built for the 1996 4087. The cans you have on there are a part # 64181 & #64182. They are the originals. I have some in stock if you need replacements. If you would like to consider the dry riser option I can meet you on your boat and see if we can refit you with the newer 4087 exhaust or design new replacements for you. You just have to take me tuna fishing is all. Missed you at the Bayliner / Meridian Rendezvous.

            [img]/media/kunena/attachments/vb/693164=28481-64182.64181.jpg[/img]

            Comment


              #7
              Pau Hana,

              We have a 1997, 3587 aft-cabin with twin 250HP Cummins 6BTA 5.9 M2 that use the National Exhaust 64181 & 64182. The port engine can is rusted and beginning to crack and leak slightly. Stbd is rusty, but not dripping yet. I purchased replacements from Scott at National Exhaust and I am getting ready to install them. I am assuming you replaced them. What type of problems did you run into while doing it. Did you replace the wet exhaust hose between the can and elbow? Did you remove and clean the heat exhanger while you had the cans out of the way? I guess I am asking what am I getting myself into. Can one person do it or do you need two sets of hands?

              Any and all comments will be appreciated.

              George

              Comment


                #8
                George, we never got around to replacing the cans before we sold the boat. e didn't have any problems with overheating, so I never cleaned the aftercoolers.

                That being said, it looked like a pretty easy job to unbolt and rebolt the cans. Scott would be the best point of contact for specifics of the job.

                And yes, Scott- I still owe you a tuna trip!

                Comment


                  #9
                  I just replaces my originals with the stainless dry riser $2500 each. They jacket the turbo and the riser. Not tested them out yet but they do reduce weight by 50%. They were made by DeAngelos exhaut here in Ft Lauderdale. I will try to send a picture later

                  Kenni

                  Comment


                    #10
                    Kenni wrote:
                    I just replaces my originals with the stainless dry riser $2500 each. They jacket the turbo and the riser. Not tested them out yet but they do reduce weight by 50%. They were made by DeAngelos exhaut here in Ft Lauderdale. I will try to send a picture laterKenni
                    http://baylinerownersclub.org/media/....jpg[/img]Hi Kenny,I bought replacements from National Exhaust. I will install them this month. I payed $2,500 for the two of them.Attached is a picture of my old rusty port can.George

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                      #11
                      I have a 1990 4387 with Hino 250hp W06DTI's and I have the can version along with a spare set.
                      Bruce
                      1989 4550 MoneyTaker III
                      "It is not the size of your boat it is how often you use it"

                      Comment


                        #12
                        NATIONAL MARINE EXHAUST wrote:
                        Here is a photo of the original stock part built for the 1996 4087. The cans you have on there are a part # 64181 & #64182. They are the originals. I have some in stock if you need replacements. If you would like to consider the dry riser option I can meet you on your boat and see if we can refit you with the newer 4087 exhaust or design new replacements for you. You just have to take me tuna fishing is all. Missed you at the Bayliner / Meridian Rendezvous.

                        http://baylinerownersclub.org/media/....jpg[/img]
                        Is the Turbo output (dry exhaust) at a lower point than the exhaust pipe to overboard? Looks like you might get some saltwater back into the turbo from the can filling with cooling water. But if there are a lot of them out there and no one is having problems, then it must be the angle of the photo?

                        Comment


                          #13
                          Glenn111 wrote:
                          Is the Turbo output (dry exhaust) at a lower point than the exhaust pipe to overboard? Looks like you might get some saltwater back into the turbo from the can filling with cooling water. But if there are a lot of them out there and no one is having problems, then it must be the angle of the photo?
                          Hi Glenn,

                          It is the angle of the photo.

                          George

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