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David Booth Posted on Feb 08, 2016

Depth sounder erratic. Giving 0.3m in a channel over 20 m. Then after many minutes starats to work for a few minutes. Then back to 0.3 or 0.4m. Makes the thing unusable in shallow water.

5 years old & no problem before. Others have reported same issue but cannot find fix?

3 Related Answers

Anonymous

  • 4 Answers
  • Posted on May 27, 2009

SOURCE: Lowrance x96 does not function after 20 feet depth

Your transducer needs to be adjusted so the return signal can be picked up. Some of these have to be super tuned to receive the signal. Also the transducer may be moving ever so slightly when the boat is traveling at speed. You may have some water turbulence interference all contibute to signal return.

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Anonymous

  • 3 Answers
  • Posted on Jul 16, 2009

SOURCE: it shows the correct depth and then intermittently

I have this problem as well! Mine is on the LMS 332C

lapinebooher

  • 1 Answer
  • Posted on Jul 24, 2011

SOURCE: shows incorrect depth suddenly and Erratic displays

MY XD510c works fine then flashes 2.5 and fills the screen with black red blue white vertical lines...then after an amount of variable amount of time goes back to working for awhile

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Related Questions:

0helpful
1answer

I have a i40 depth sounder new. it worked ok for a

Sounds very much to me like there is a faulty connection at the back of your display or a broken signal lead from your transducer. That's where I'd start tracing the signal from anyway.

Hope this helps
-Steve
Oct 07, 2014 • Boating
0helpful
1answer

My Garmin 498C will not show the contore of the bottom or give me a depth reading. The GPS works and will show me charts but, not the sounder option though.

You need to check to see if the depth sounder transducer is connected or functioning. It might be turned off, the connectors may be bad or the transducer is bad. I don't have the 498 manual in front of me but I think there is a test function under the setup menu. I'd check my connections (the usual suspect) then run that.

Garmin tech support is pretty good/quick. So don;t be afraid to give them a call.
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I have a gps Map 498-depth sounder not working? Have new transducer from Garmin-it flashes "00"-it is not connected to boat yet (transducer)-need it be or can I put in a bucket of water (need it be in...

If the transducer is out of the water, you will not get a reading and see the flashing depth. You should hear and feel the clicking in the transducer when out of the water and working properly. Are you getting a temp reading when out of the water?
May 16, 2010 • Boating
0helpful
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Furuno 4100 depth sounder shows depth twice what it really is

check your gain setting try auto gain and try manually gaining back to see if it resolves, if yes, send unit in to furuno, if no, ducer is probably at fault.
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Depth sounder

the transducer has to be in the water or attached to the inside of the hull if fiberglass with no air between the hull and the transducer. It doesn't transmit thru air.
1helpful
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Faria Depth finder

I've found this manuals in Faria's site:

Depth sounder:
http://faria-instruments.com/site_manuals/IS0091F.pdf

Bombardier Depth Sounder:
http://faria-instruments.com/site_manuals/IS0138_C_digital_depth_sounder_owners_manual.pdf

Depth Sounder, Flushmount:
http://faria-instruments.com/site_manuals/IS0141c.pdf

Depth Sounder, Flush Mounted, Remotely Switched:
http://faria-instruments.com/site_manuals/IS0229_A_Digital_depth_sounder.pdf

there are also other useful manuals in the bottom of the page:
http://www.faria-instruments.com/downloads.php

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Depth Sounder does not display depth

I will see if I can get mine off the hull for testing. Still have found no procedure. Thinking about just replacing the sounder with another unit.
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Depth sounder problem

If the transducer is mounted off of level, an error is introduced due to angle. It is a fixed percent offset, say 10%. so 10 feet reads 11 and 100 reads 110. There is an offset function to read depth below ducer, depth below keel, and depth below waterline, but these are fixed amounts in feet, not a percentage. Look at the transducer when it is operating, boat angle considered.
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Si-tex cvs 106 mk11echosounder

To re-program the Si-tex CSV-106 depth sounder to feet/meters/fathoms: Push and hold down the MENU key while turning the unit on (POWER key) to enter a special menu. Release both keys after you hear two beeps, almost immediately. Use the LOWER ALARM key to select the desired unit for depth, then turn off the depth sounder. That's it, just turn on again to see the change.
There is also another menu (for testing sounder) available by pressing the MODE and turning on as above.
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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.
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