20 Most Recent Humminbird Matrix 12 Fishing System - Page 3 Questions & Answers

Be sure you have your unit set in "max mode" and run it on 200khz frequency see if this makes any difference. Also be sure your unit is wired directly to your battery not through a switch or fuse panel as this can rob your unit of voltage, impacting the strength of your sonar signal.

You need to set the transducer lower. When at speed, the hull of the ship raises up out of the water and hence your transducer is probably not deep enough at these times to give a proper reading.

Several things could cause this: Stratified water temperatures. if the water is undisturbed and there are layers of warm and cool water, this can cause the problem. Fresh and salt water layers can also cause this. Debris in the water. can cause it as well. layers of turbid water and clear water can be a problem. If these are not issues, then make sure all connections are tight, and that there is no bottom paint on the transducer.

My 787c2 screen just shows lines across it does anyone know were to get a new screen for it hummingbird says they don't stock them anymore try Humminbird Fishfinder Depth Finder Humminbird GPS Chartplotters...

is your transducers 83hkz and 200hkz or just 200 hkz???