Question about Garmin Gpsmap 498, External Antenna With Dual Frequency Transom Mount Transducer

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My sounder works very eratic. Sometimes it works and sometimes not. Most of the time it is just flashing 0.0ft. The speed and temp both work fine.

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What version software are you running in your 498?

Posted on Oct 20, 2011

  • dnbloch
    dnbloch Jul 11, 2012

    coastal waters

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Mine does the same thing. i plugged in my old gpsmap 168 sounder, and depth works fine! so i "assume" it's something inside the 498 . . . I'm going to try buying a new 498 because i don't want to mess with the wiring or the mount

Posted on Jun 04, 2010

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Posted on Jan 02, 2017

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