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1978 johnson 115 power trim problem

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  • 1978 johnson 115 power trim problem

    the two small pistons work fine but the larger cylinder in the middle doesn't work. the motor sounds fine and it seems to e full of fluid. what can I check? thx, chris

  • #2
    Raise the mtr to the full tilt position. Then check and fill the fluid. Then cycle it up and down 10 times and re-check fluid.


    • #3
      it wont raise up by itself. I can manually raise it up and down even with the screw that you loosen to let it down without power is tight.. it acts like there is no fluid in the main cylinder, only the two smaller ones.


      • #4
        also I raised it up manually and filled with fluid but it still wont work


        • #5
          any other ideas?


          • #6
            Did you re-check the fluid level? Normally, it takes more than one raising and filling to get rid of the air if it exists.

            Also, don't forget to close the manual release valve after filling.
            Our Questions Require Answers... If You Refuse To Answer Our Questions... How Can We Answer Yours?


            • #7
              yes and yes. I have raised and lowered it manually about twenty times and it doesn't matter if the manual release valve is open or closed I can still raise and lower it manually.


              • #8
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                well I guess I'm going to give up on this unit and buy one off ebay. does anyone know what years the trim unit is interchangeable?