Minimum compression?

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  • December 8, 2020 at 11:45 am #224622
    The Boat House
    Participant


      https://youtu.be/GYATPSzHwfc

      December 8, 2020 at 1:09 pm #224630
      Buccaneer
      Participant

        US Member

        Tubs, great explanation and demonstration!
        Looks like you have a nice gauge set.
        I’m still using my 30 plus year old Craftsman
        gauge, but it’s working good.

        Prepare to be boarded!

        December 8, 2020 at 8:41 pm #224674
        fleetwin
        Participant

          US Member - 2 Years

          OK, I’ll bite. The first picture makes sense. But, just where is the check valve in the second picture, you mention it is “at the gage”…Nonetheless, the slight drop in compression makes sense from the first to the second picture.
          But, just where is the check valve in the third picture?? It appears to be in blue plastic sleeve just below the gage. Maybe the picture is deceiving and there is another one near the plug threads.
          Your fourth picture mentions that the check valve is “at the gage” and shows a low compression reading, which makes sense.
          I’m wondering why there is such a difference between the third and fourth readings, when it appears that the blue check valve is just below the gage….Again, maybe you had two check valves and were using one near the spark plug hole…
          As usual, I’m probably just overthinking all this… Just want to make sure I understand what you are pointing out…Don

          December 8, 2020 at 9:05 pm #224675
          The Boat House
          Participant

            December 8, 2020 at 9:07 pm #224676
            The Boat House
            Participant
              Buccaneer wrote:

              Tubs, great explanation and demonstration!
              Looks like you have a nice gauge set.
              I’m still using my 30 plus year old Craftsman
              gauge, but it’s working good.

              December 9, 2020 at 6:26 am #224691
              fleetwin
              Participant

                US Member - 2 Years

                OK, so your set up in the second to last picture has two check valves? One in the threaded tip, then another one up by the gage in the blue??? Again, I’m agreeing with you but just trying to understand your various set ups…

                December 9, 2020 at 9:39 am #224737
                The Boat House
                Participant

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