Question about Garmin Gsd 21 Sounder Blackbox Fishfinder Module

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Gsd 21 sounder not working properly

Works fine above 20 feet, below 20 feet I loose bottom and the depth goes wacky reads 1.5 feet . I get a blank screen or a static screen. I have it hooked up with a garmin 3010 chartplotter

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  • chip2594 Jan 27, 2009

    Having same problem with finder working in shallow water randomly. Will not work in depths over 15 to 20 feet. Was told by tech support that module needed to be replaced. Replaced module and same problem is occuring. When system first is turned on it has a hard time acquiring GSD signal.

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SOURCE: unable to track the bottom

I think you need to level the transducer. You have it pointed way out in front of you so that when you're going fast it is able to bounce the signal off the bottom and it comes back to where the boat has traveled to. When you're going slow you're bouncing it out in front of you but it comes back up in front of you. Sorry but I can't find a picture of a Garmin transducer. Hope this helps.

Posted on Jun 02, 2009

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1 Answer

Garmin 100 echo stays in simulate mode. Is there a setting to change it to live mode?


1 turn off the simulator in the menu.

if that does not work

2. Check the connection to the transducer, if it is unhooked or corroded, clean and reattach the connector, the unit will stay in simulator mode if it does not detect a transducer attached to it

Apr 21, 2014 | Garmin Gsd 21 Sounder Blackbox Fishfinder...

1 Answer

My GSD 21 is mated to a Garmin 3210. Bought both componants new. Every single year since new it works 2-3 trips. Then just doesn't come on. Have to send it back to garmin who so far have waranted...


The GSD 22 is discontinued. I would not buy any electronics that are discontinued, because there has to be a reason.

If I were in your shoes I would be looking a full change to either the brand leaders, Raymarine or Humminbird. I have had Humminbird since 2007 with a 798SI and since 2014 with a 998SI HD. 100% reliable for GPS and depth. Boat used twice a week May to October. The 998 has features to set a chart course and I do that when coming from Toronto to Port Credit. Humminbird also do full chart plotters, but in Georgian Bay, I wouldn't have thought necessary unless you use an auto-pilot. Uses Blue Chart maps.

You aren't the only one to have problems. Read the link below.

I did find this thought and there are others in the thread
http://www.thehulltruth.com/marine-electronics-forum/146766-installer-i-stumped-garmin-problem.html

Make certain that the transducer(s) cable is separated from any engine power cables. When those wires cross or are bundled together, the highly sensitive sonar signal gets polluted with high amp noise bleeding off the engine wires, and you're lucky to get any signal.
To test if this is the problem, shut your engines off and see if you get a good sonar view. Then start the engines and see if the same sonar quality is displayed. If it degrades, you've got the current bleeding problem.
I had this problem when I installed the new gear (Furuno 585, Airmar b60) and ended up re-routing the transducer cable using some "wire hangers" to keep the transducer cable away from the others. Now I get a firm fix on the bottom at all speeds and the only time the display gets lost is when I reverse the starboard engine, from air bubbles under the thru-hull.


GSD 21 with 3210 problems - Google Search

Mar 21, 2017 | Garmin Gsd 21 Sounder Blackbox Fishfinder...

1 Answer

Unable to track the bottom


I think you need to level the transducer. You have it pointed way out in front of you so that when you're going fast it is able to bounce the signal off the bottom and it comes back to where the boat has traveled to. When you're going slow you're bouncing it out in front of you but it comes back up in front of you. Sorry but I can't find a picture of a Garmin transducer. Hope this helps.

Jun 02, 2009 | Garmin Gsd 21 Sounder Blackbox Fishfinder...

2 Answers

Sounder not working


Interference like that is usually caused by electrical noise. Does it happen when everything else on the boat is turned off? If the answer is no, then you can isolate the source of the interference by turning things on one at time. Follow your transducer cable and make sure it has not been damaged or altered in any way.

Also make sure that your gain is set to auto

The GSD 21 has an LED indicator light on it. If it detects a malfunction the LED will flash in distinct colors or patterns. In the troubleshooting section of the owners manual there is a list that explains what each flash pattern means.

Jul 24, 2008 | Garmin Gsd 21 Sounder Blackbox Fishfinder...

1 Answer

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

Jul 14, 2008 | Faria Boating

1 Answer

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.

Jun 18, 2008 | Furuno GP1650DF GPS Receiver

1 Answer

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.

Apr 26, 2008 | Computers & Internet

1 Answer

GSD 20 power problem


I'm not sure what you mean by "cannot get the sounder to power up". Are you not getting power to theGSD20, or are you not getting the sounder to display on the screen? I can probably help you with this but I need some more information.

If you are getting power to the GSD 20 sounder, it will have a flashing LED next to the cables that plug into the GSD 20 box. What color is it and what is the flash pattern (how many flashes, and fast or slow?) When you power up the GSD20 does the color or flash pattern change.

I'll watch for your response here.

Feb 23, 2008 | Garmin GPSMAP 3010C GPS Receiver

1 Answer

NO DEPTH READING


Check the finder on the bottom of the boat and make sure the cable is ok?

Aug 09, 2007 | Garmin 185 Sounder GPS Receiver

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