Pressure Tank Questions – QD15

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  • July 12, 2024 at 2:08 pm #289089
    John Gragg
    Participant

      US Member

      Finally getting to the QD15. I have a tank with a new (nos) diaphram and gaskets. My questions are:

      Seems like the plunger (aluminum rod plunger w/ 9 hole diaphram) doesn’t have as much up/down travel as I imagined. Normal?

      When I pump the plunger I get fuel in the glass bowl, but I can see the fuel ‘leak down’ ever so slightly afterward. Normal?

      1st experience with a remote tank. Thanks for any help/advice.

      Best Regards

      John

      John Gragg
      RIverside, CA

      Just starting in the hobby, please be patient.

      48 Sea King 5hp GG9014A
      49 Sea King 5hp GG9014A
      48 Johnson TD20
      49 Johnson TD20
      54 Johnson QD15
      55 Johnson CD12

      July 12, 2024 at 5:20 pm #289098
      frankr
      Participant

        US Member

        The check valves in the tank are not perfect nor expected to be, so I wouldn’t worry about the leakdown.

        Since the pump is pumping gas to the carburetor and hopefully no gas leaks anywhere you probably are ok.

        1 user thanked author for this post.
        John Gragg
        July 12, 2024 at 6:16 pm #289101
        John Gragg
        Participant

          US Member

          Thanks Frank,

          Yes, I hadn’t tried running it yet but did so today. Couldn’t get it to stay running, had to keep priming the carb to get fuel into the bowl. Finally took a close look at the tank and found I had not screwed the pump housing down tight enough (a couple of minor air pressure leaks). Fixed that and now it runs like a top! First run since I got it almost a year ago. My CD12 did just as well! Two runners, time for cosmetic work.

           

          Thanks again,

          Best Regards,

          John

          John Gragg
          RIverside, CA

          Just starting in the hobby, please be patient.

          48 Sea King 5hp GG9014A
          49 Sea King 5hp GG9014A
          48 Johnson TD20
          49 Johnson TD20
          54 Johnson QD15
          55 Johnson CD12

          July 12, 2024 at 7:29 pm #289105
          crosbyman
          Participant

            Canada Member - 2 Years

            great news… “patience brings joy”  …said the fortune cookie 🙂

            Joining AOMCI has priviledges 🙂

            1 user thanked author for this post.
            John Gragg
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