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I have a Garmin 182c with a garmin GSD20 sounder unit ,if my transducer wire is cut or nicked would it cause the unit to unit to read " sonar turned off" ?

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If you nicked it good enough yes it can. If the receiver doesn't detect the transducer, a digital message on the display will indicate this.




Posted on Mar 18, 2011

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I am thinking about buying a garmin 451 chartplotter, can I connect this to my garmin 160c fishfinder for sonar capability?


Hi James!
According to the owner's manual, the 451 can be used as a fishfinder when connected to a transducer. I would contact Garmin directly to see if the ducer from your 160c is compatible with a 451. If it is, you're in business! You'll likely have to cut/splice cable, but it'd be far easier than replacing the thru-hulls. (The 451 does come with transducers.)

It has been my experience that Garmin is REAL good when it comes to answering questions from consumers.
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http://www.garmin.com/us/support/

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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

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1 Answer

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Garmin tech support is pretty good/quick. So don;t be afraid to give them a call.

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