February 01, 2014 at 9:35pm
Guessing that the transducer was mounted on the transom outside the boat, check to see if the mount bracket is not messed up. This may be allowing the transducer to move freely. I had the same issue with a different model, but the bracket was messed up and allowed the transducer to move move freely. When i would run, the water would passing under would push the transducer up at an angle giving readings of up to 600' at times. My messed up mount would not allow it to rest at the proper angle once I stopped so I would have to reach in the water and push it down to get an accurate reading.