Home Forum Ask A Member HD-25 float replacement

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  • #237992
    jimbrizzolara
    Participant

      The carb float in HD-25 is shot. I could make a new one out of cork, but the dope to seal it would cost more than a Mercury plastic float, which I read can be used. On the Poche website he mentioned that the Merc float would have to be modified. Does anyone have experience with this?

      #237993
      crosbyman
      Participant

        Canada Member

        folks here will tell you they work fine but you need to drill a center hole for the pin and clip .. never done one myself but if the Merc float is the same diam. no reason not to work

        Joining AOMCI has priviledges 🙂

        #238014
        Mumbles
        Participant

          The Merc floats work great and I have installed several in my TN motors. The small spring in them has to be removed and then I drilled them out to get a friction fit on the needle. With a friction fit, the float level can be easily adjusted.

          DSC00008

          #238019
          aquasonic
          Participant

            US Member

            It’s been a while since I worked on an HD, but isn’t the HD float a smaller diameter than the TD/TN float?

            #238021
            jimbrizzolara
            Participant

              I think you’re right. The Merc part number I have for the float is a different number than the one in the picture. Thanks for the replies.

              #238084
              aquasonic
              Participant

                US Member

                I’m thinking that the TD/TN float is 1 1/8″ diameter, and the HD float is 1″ diameter, but not exactly sure. Is there one Mercury float for the “T” series, and a different one for the “H” series?

                #238095
                crosbyman
                Participant

                  Canada Member

                  are those floats solid core ?? or empty

                  if solid maybe you can spin it down to 1” over sand paper ??

                  Joining AOMCI has priviledges 🙂

                  • This reply was modified 3 years, 10 months ago by crosbyman.
                  • This reply was modified 3 years, 10 months ago by crosbyman.
                  #238098
                  Mumbles
                  Participant

                    Whoops, didn’t even think about the different OD’s. The part number shown in my earlier photo is the current P/N for the one in this older photo.

                    Mercury-Johnson-Floats

                    #238101
                    lloyd
                    Participant

                      US Member

                      TD/TN floats are 1 3/16 diameter and 1″ tall. HD float is 1 1/16 diameter and 3/4″ tall. I would make one from cork and seal it with old time acetate dope, but whatever makes you happy and floats your cork.

                      #238108
                      jimbrizzolara
                      Participant

                        I found a large cork, Superglued it to a large screw head, and sanded the cork to size in my drill press. I sealed the cork with Seal-All, which in my experience is very fuelproof. Thanks for all of the assistance, I’ll hopefully try out the motor today.

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