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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When we are deep water (500 ft or deeper) the fish finder will display 3.5-10 ft. and won't show the fish or shows tons of fish. Are we able to set the depth that we would like to see eg: if we are...


Im not familiar with your particular unit but you should be using a low frequency transducer for water over 500'; something like a 50 kHz transducer or a dual frequency transducer like a 50/200kHz for detail with the high freq. but increased depth range on the lower frequency. As far as setting it to 250 ft, you should be able to use the range feature and adjust the maximum to 250'. typically the factory default is automatic so it will caonstantly adjust the range based on the maximum current depth.

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1 Answer

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Jan 07, 2009 | Navman Fish 4150sx GPS Receiver

1 Answer

Navman 4150 sx


Go to the Website of Pertec.co.za and download the manual for the 4150 and 4150sx
Hope this will help

Regards

Albie Rossouw
albieros@mweb.co.za

Jul 20, 2008 | Navman Fish 4150sx GPS Receiver

1 Answer

Navman 4150 fishfinder


Depth: Could be for a number of reasons, too deep for the sounder - check the manual for it's max depth. Dirty water, sounder unable to penetrate through to the bottom. Weed or other debris covering the transducer. Transducer on a swing mount & being pushed out of alignment then dropping back in once stopped.

Speed: Is the speed readout controlled by a GPS or paddlewheel? If it's GPS, check the power connection of the sounder, may be loose which would also cause the depth to 'drop out'. If it's paddlewheel, you're down to bad connections or faulty unit.

Oct 16, 2007 | Navman Fish 4150sx GPS Receiver

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