My sounder is a Furuno LS4100,* it has both 50 and 200 htz frequencies.* The display unit is only 2 years old, but the transducer is 13years.
Normaly, this unit does and outstanding job of displaying depth.
During the last few days I have been getting erratic signals.* Not only will I get a blank screen, but often the readings are WAY off.* 1000 ft in 15 ft for example.
It seems to be able to hit once in a while on the 200htz setting, while the 50htz setting hardly even shows any signal, but is always wrong.
Would anyone know if this is sounds like a transducer going bad?