02-15-2015, 10:42 PM
Have you been using it for a while? I was having the same issue with a used GPS/fish finder I bought. I had a bow mount trolling motor in the front of my boat, that had a built in transducer for a second fish finder. The second fish finder was always showing fish but my transom mounted transducer rarely picked up those same fish. At first I figured those fish I was marking at the front of the boat just split ands went on either side of the boat, as I went by but after a while a friend told me, I had a bad transducer. I borrowed a transducer from another friend, that was selling one with the same cable and sure enough, that fixed the problem. Let me ask another question, does your depth display flash or does it always display the correct depth without flashing? When I first started having the problem like yours, it was just not showing the fish, after a while the depth display started flashing and that was when I tried a new transducer.
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