Home Forum Ask A Member Rings for Johnson HD-25’s?

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  • #6659
    Buccaneer
    Participant

      US Member

      The Johnson HD-25 parts manual shows the number
      for piston rings as part # 43-78.
      Is there an updated number?
      Not sure I’m going to throw much money in these little HD’s,
      but thought if I came along a good deal on rings
      I might try them on one and see if it upped the compression
      just enough for it to idle better.
      Probably a temporary fix at best, but just "thinking".
      Thanks.

      Prepare to be boarded!

      #55408
      frankr
      Participant

        Anytime you see one of those old numbers, eliminate the – or letter, or whatever. Then pad it with enough zeros up front to make it a 6-digit number. In this case, 004378. Then you have to go to a price list to see if it has been superseded. It has. It changed to 378410 ring set.

        #55419
        Buccaneer
        Participant

          US Member

          Thanks Frank for the lesson and help!

          Prepare to be boarded!

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