1958 Johnson QD 19 10HP cooling question

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  • June 3, 2018 at 10:20 pm #10140
    bob-d
    Participant

      US Member

      During my 1st startup after rebuild, water was shooting out of both sides of the lower unit. The motor originally had cooling issues with a boiling hot lower unit that was solved by clearing a cooling port under the head. Head temp is fine,and there is plenty of water coming out rear exhaust. New gasket as well under head.
      Question is….is this normal for water to be shooting out (which I imagine is from the now clear cooling port) , and would it keep the lower unit cooler if they were plugged?
      Thanks,
      Bob D

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      June 3, 2018 at 11:41 pm #77362
      lindy46
      Participant

        US Member

        See this diagram:
        http://www.marineengine.com/parts/johns … =Gear+Case
        You are missing part number 6 (305304) which sits on top of the water pump housing and connects to the exhaust housing. I had the same problem on my QD23. Without that part, water shoots up the drive shaft "canal" and out those holes. You’ll have to find a used one as they are unavailable. You’ll also need the two O-rings which fit on the top and bottom of the spacer.

        June 3, 2018 at 11:56 pm #77363
        chris-p
        Participant

          I just looked and Ive sold all of mine but will keep looking.

          A few are on ebay.

          https://www.ebay.com/itm/1961-JOHNSON-E … SwkvdaaqrW

          June 4, 2018 at 12:23 am #77365
          bob-d
          Participant

            US Member

            Lindy, thanks so much. I never would have figured that one out.
            I thought the water was coming from the top by the powerhead!
            Bob D

            June 4, 2018 at 2:11 am #77373
            fleetwin
            Participant

              US Member - 2 Years
              quote Bob D:

              Lindy, thanks so much. I never would have figured that one out.
              I thought the water was coming from the top by the powerhead!
              Bob D

              The water is coming out of the driveshaft tube in the exhaust housing….And, I’m thinking Lindy is right, you are missing the water pump seal pipe and orings that sit on top of the impeller housing and fit up into the exhaust housing….

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