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Humminbird sounder problem-gctid372236

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    Humminbird sounder problem-gctid372236

    I installed my Humminbird 788 and have a problem with the transom mounted transducer. At no wake speed it shows a very clear screen and depth, when I increase speed the readings become messed up and erratic. Any help or info would be great.

    Thanks
    1992 4588


    Seadoo Wake 170

    #2
    A photo of where the transducer is mounted would help.
    Pat says: DO-IT-RIGHT THE FIRST TIME!

    Bayliner 3870 "ALASKA33)
    Twin 350 GM power
    Located in Seward, AK
    Retired marine surveyor

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      #3
      boatworkfl wrote:
      A photo of where the transducer is mounted would help.
      I won't be able to take a pic, she is in the water for the next 6 months.

      Its mounted at the lifting strake between the drive and trim tab. Previous owner had one mounted in the same location.
      1992 4588


      Seadoo Wake 170

      Comment


        #4
        joe440 wrote:
        I won't be able to take a pic, she is in the water for the next 6 months.

        Its mounted at the lifting strake between the drive and trim tab. Previous owner had one mounted in the same location.
        If its mounted at the lifting strake that could very well be the problem. Too much turbulence there. If you don't want to put up with the erratic readings, don't want to pull boat and want a permanent fix buy an angled puck shoot thru the hull transducer from Humminbird. I had one of those on my boat for 12 years. I never lost bottom or had erratic readings. You will have to buy a separate temp sensor that you can install when haul your boat for the season.

        http://"http://store.humminbird.com/...13996/XAP_9_20
        Port: Sassafras River Georgetown, MD Bayliner 2000 2855 7.4

        http://www.chart.state.md.us/video/v...50fa36c4235c0a

        Comment


          #5
          There should be some adjustments you can do in the water. Play with that and see if you can make it better. As said its the turbulence. Raise it a bit, lower it, change the angle. or do as suggested, shoot through the hull.

          You can remove yours from the bracket and use it to shoot through the hull. It will work perfect. Just leave the bracket installed until you get the boat out of the water.

          On another thread yesterday I made a suggestion on how to do that. Its in this thread. http://www.baylinerownersclub.org/fo...installing-gps

          Doug
          Started boating 1955
          Number of boats owned 32
          Bayliners
          2655
          2755
          2850
          3870 presently owned
          Favorite boat. Toss up. 46' Chris Craft, 3870 Bayliner

          Comment


            #6
            I'll try shoot thru the hull.

            Thanks for the advice.
            1992 4588


            Seadoo Wake 170

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