Question about Navman Fish 4150sx GPS Receiver

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4150sx finder erratic depth

My finder keeps flashing from a low depth to a high depth eg.30ft to 3.4ft Can anyone help please.

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I had the same problem last time I was out in shallow water (in less than 2 metres of water) and I suspect that the problem was weed wrapped around the transducer but won't know for sure until I take it out on the water again. I had another problem re water temp which I'll enter separately.

Posted on Apr 24, 2009

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