QD-20 questions

Home › Forum › Ask A Member › QD-20 questions

Viewing 5 posts - 11 through 15 (of 15 total)
1 2
  • Author
    Posts
  • October 20, 2018 at 6:04 am #84674
    garry-in-michigan
    Participant

      Lifetime Member

      The very first tanks had a ring around the top for hose storage. It quickly became apparent that despite drains in the ends, dirt and moisture still promoted corrosion. The next tanks (1951) had the rings removed and the stamped "ears" added. . . 😉


      October 20, 2018 at 2:57 pm #84689
      amuller
      Participant

        Thanks. The Marineengine.com detail parts listings stop around 1957.

        It’s interesting that OMC found it cost-effective to produce such complicated, high-parts-count tanks. Do modern fuels eat the diaphragms?

        October 20, 2018 at 7:08 pm #84708
        amuller
        Participant

          Do these motors have needles on the rod small end? And what about the center main bearing? It’s not obvious from the info I have.

          October 20, 2018 at 7:41 pm #84710
          chris-p
          Participant

            The QD lineup eventually got needles on the small end of the rod. Yours does not. The center main also does not have needles bearings. That is why you run these on 24:1, never 50:1 as sometimes suggested on here.

            You can upgrade to needles on the earlier pre 1961 QDS though, I do it all the time when I rebuild a powerhead. The 1963 set is the best set to use as the rod was beefed up through the years as well. You have to pretty much swap everything though.

            October 20, 2018 at 7:43 pm #84711
            chris-p
            Participant

              …and yes the original diaphragms need to be swapped out if they are original!

            • Author
              Posts
            Viewing 5 posts - 11 through 15 (of 15 total)
            1 2
            • You must be logged in to reply to this topic.