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Water discharge? 1976 15R76A 15 hp Johnson.

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  • Water discharge? 1976 15R76A 15 hp Johnson.

    Can anyone send me a picture of where cooling water discharges? I ran my engine for a short while, and did not see any water from anywhere. Thank you.

  • #2
    On that model, the water shoots out the hole at the rear portion of the long exhaust housing... with the majority of it going out the exhaust through hub propeller. There is no water telltale outlet as per the later models.

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    • #3
      My guess is the schematic below is for your outboard.

      In looking at the flow directional arrows (i.e. water circulating as the OMC designers intended) when the thermostat is closed all the pumped water exits the hose connected to the exhaust cover (i.e. the tell tale outlet). With the thermostat open, some of the water will exit the hose but some will exit through the prop.
      Attached Files
      Last edited by brw0513; 08-28-2017, 06:45 AM.

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      • #4
        Thank you for the help.

        Thank you.

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        • #5
          Hi Micahel 1.

          I was way off the mark with my previous post above. Sorry

          I've been doing more research on my 2001 15Hp Johnson and cam across this webpage that might interest you:

          74 on water problems

          The is a Section with the title No Overboard Water Indicator as we Know it, Not Used on Early Motors

          It might be useful.

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