Lowrance 3400 Depth Finder Replacement?

[Knot Waiting]

The display on my OEM installed 3400 does not work. I can hear the shallow water alarm so I assume the transducer and cpu are working. Since this is an old model does anyone know where to find replacement displays or if there is a compatible unit that utilizes the transducer puck in the bilge? I do not want to drill anything to my transom. Thank you.

 

[shawn l]

Re: Lowrance 3400 Depth Finder Replacement?

The display on my OEM installed 3400 does not work. I can hear the shallow water alarm so I assume the transducer and cpu are working. Since this is an old model does anyone know where to find replacement displays or if there is a compatible unit that utilizes the transducer puck in the bilge? I do not want to drill anything to my transom. Thank you.

View attachment 152323

I happen to have this same 3400 depth finder with an excellent display unit. My problem is water got into the separate main circuit black box.

 

[shawn l]

Re: Lowrance 3400 Depth Finder Replacement?

Unfortunately, the 3400 uses 192khz transducer signal where all newer units use a 200khz transducer signal which make them incompatible.