I am struggling with trying to get my Garmin 240 Fishfinder to consistantly
read the depth. I am getting a very inconsistant reading. Even when I'm
getting a reading it's only a very narrow black line that indicates the bottom.
The line will start to get smaller and smaller eventually fading out with the
depth reading blinking. I have moved this thing all over the back of the
transom; left, right, up and down with no change in the results.

Has any one else had this problem. How did you solve it? Thanks so much in
advance!