Announcement

Collapse
No announcement yet.

Shaft Noise-gctid826450

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    Shaft Noise-gctid826450

    3988 with Cummins. Noticing a "wining/whistle" like noise when I slip the port engine into gear and a vibration above 1800rpm. Does anyone know the symptoms of a cutlass bearing beginning to wear?

    Thanks

    #2
    Re-align the shaft in the water, then check for the whine, if it still makes noise could be cutlass or a transmission bearing or gear, or shaft packing which the shaft may ride on the packing nut.

    After checking the packing and the noise persists, then disconnect the shaft and back it out enough to clear the transmission and check for play in the output bearing.

    If there is no play in the transmission bearing then that leaves the cutlass bearing.

    I do not know if you can run the transmission disconnected from the shaft to check for noise!
    Pat says: DO-IT-RIGHT THE FIRST TIME!

    Bayliner 3870 "ALASKA33)
    Twin 350 GM power
    Located in Seward, AK
    Retired marine surveyor

    Comment


      #3
      Thanks for the response. Not sure how to check the alignment in the water. That is beyond my scope I think. I suspect I would need a shaft gauge if there is such a thing.

      I have a drip-less system that was installed prior to purchase. Therefore I am not sure what the stuffing box set up is.

      Good idea of disconnecting the shaft to rule out the transmission.

      Greatly appreciate your input here.

      Comment


        #4
        This video discusses various alignment issues and fixes. Hope it helps.

        https://m.youtube.com/watch?v=3_w0LvD6gEc
        "Martini's Law" SOLD
        1986 Bayliner 3270, 110 Hino's
        Nova Scotia, Canada

        Comment


          #5
          "Checks Five-Oh" post=826457 wrote:
          Thanks for the response. Not sure how to check the alignment in the water. That is beyond my scope I think. I suspect I would need a shaft gauge if there is such a thing.

          I have a drip-less system that was installed prior to purchase. Therefore I am not sure what the stuffing box set up is.

          Good idea of disconnecting the shaft to rule out the transmission.

          Greatly appreciate your input here.
          The final alignment should only be in the water!

          That hull will move once in the water!
          Pat says: DO-IT-RIGHT THE FIRST TIME!

          Bayliner 3870 "ALASKA33)
          Twin 350 GM power
          Located in Seward, AK
          Retired marine surveyor

          Comment


            #6
            "Checks Five-Oh" post=826457 wrote:
            Thanks for the response. Not sure how to check the alignment in the water. That is beyond my scope I think. I suspect I would need a shaft gauge if there is such a thing.

            I have a drip-less system that was installed prior to purchase. Therefore I am not sure what the stuffing box set up is.

            Good idea of disconnecting the shaft to rule out the transmission.

            Greatly appreciate your input here.
            You do not have a packing gland with the dripless system on your shaft.
            Pat says: DO-IT-RIGHT THE FIRST TIME!

            Bayliner 3870 "ALASKA33)
            Twin 350 GM power
            Located in Seward, AK
            Retired marine surveyor

            Comment


              #7
              Good question to which I do not have an answer. Not even sure how I would find out.

              K/r.

              Comment


                #8
                Checks Five -Oh

                re shaft whine

                Just a thought but this past summer I had similar whine on port engine only

                It only happened wnen going forward and only port engine and only at higher RPM

                Turns out it was just the shaft zinc on port shaft .Simple adjustment and all was well

                If you have shaft zincs engine room check it out

                Comment


                  #9
                  If you have a bonding shaft wipe between the coupling and the packing that may be the issue, I found that out on my 3870 this year.

                  If so clean the shaft and wipe, I also took some very fine emery cloth and touched up the shaft and the wipe.
                  Pat says: DO-IT-RIGHT THE FIRST TIME!

                  Bayliner 3870 "ALASKA33)
                  Twin 350 GM power
                  Located in Seward, AK
                  Retired marine surveyor

                  Comment


                    #10
                    "boatworkfl" post=826591 wrote:
                    If you have a bonding shaft wipe between the coupling and the packing that may be the issue, I found that out on my 3870 this year.

                    If so clean the shaft and wipe, I also took some very fine emery cloth and touched up the shaft and the wipe.
                    Just curious...what is a shaft wipe?
                    "Martini's Law" SOLD
                    1986 Bayliner 3270, 110 Hino's
                    Nova Scotia, Canada

                    Comment


                      #11
                      "diveguy" post=826700 wrote:
                      "boatworkfl" post=826591 wrote:
                      If you have a bonding shaft wipe between the coupling and the packing that may be the issue, I found that out on my 3870 this year.

                      If so clean the shaft and wipe, I also took some very fine emery cloth and touched up the shaft and the wipe.
                      Just curious...what is a shaft wipe?
                      It is a bonding device, like a brush on an electric motor, usually made of metal though, an arm with tension holds it to the shaft and is connected to your bonding system.

                      I have them on my 3870, sometimes they squeak so I clean the shaft with a SS brush and it is ready to go.

                      http://www.google.com/url?sa=t&rct=j...HI0nnMLu-Y7SrN
                      Pat says: DO-IT-RIGHT THE FIRST TIME!

                      Bayliner 3870 "ALASKA33)
                      Twin 350 GM power
                      Located in Seward, AK
                      Retired marine surveyor

                      Comment


                        #12
                        "diveguy" post=826700 wrote:
                        "boatworkfl" post=826591 wrote:
                        If you have a bonding shaft wipe between the coupling and the packing that may be the issue, I found that out on my 3870 this year.

                        If so clean the shaft and wipe, I also took some very fine emery cloth and touched up the shaft and the wipe.
                        Just curious...what is a shaft wipe?
                        [img ]http://stevedmarineconsulting.com/wp-content/uploads/2015/11/041912418-1024x680.jpg[/img]
                        1999 3788, Cummins 270 "Freedom"
                        2013 Boston Whaler 130 SS
                        Anacortes, WA
                        Isla Verde, PR

                        Comment


                          #13
                          That's what I call it.
                          P/C Pete
                          Edmonds Yacht Club (Commodore 1993)
                          1988 3818 "GLAUBEN”
                          Hino EH700 175 Onan MDKD Genset
                          MMSI 367770440

                          Comment


                            #14
                            Oh ok. I Never saw those before. So with a shaft wipe connected or bonded to the hull Anode, I assume, you would not need shaft zincs?
                            "Martini's Law" SOLD
                            1986 Bayliner 3270, 110 Hino's
                            Nova Scotia, Canada

                            Comment


                              #15
                              "diveguy" post=826750 wrote:
                              Oh ok. I Never saw those before. So with a shaft wipe connected or bonded to the hull Anode, I assume, you would not need shaft zincs?
                              The shaft wipe is there to complete and equalize the bonding of all the protected under water metal, even though the shaft is connected through the coupling, when measured there is a slight difference with-out the shaft wipe.

                              You do not want the electrical bonding field to go directly through the bearings in the transmission.
                              Pat says: DO-IT-RIGHT THE FIRST TIME!

                              Bayliner 3870 "ALASKA33)
                              Twin 350 GM power
                              Located in Seward, AK
                              Retired marine surveyor

                              Comment

                              Working...
                              X