Hummingbird depth finder

[surroundsound64]

My depth finder doesn't seem to be working. I just bought the boat and don't know model number or anything about this unit. Can someone tell me from the pics below which model it is and maybe have a manual?

[Brichter14]

Mine didnt work either when i got mine. I bought a faria instead.

[surroundsound64]

Was it a drop in replacement or a whole system?

[Brichter14]

Whole system. The humming bird had a bilge mounted transducer that i think went bad. The faria has a transom mounted transducer as well as air/water temp. 160$ upgrade, well worth it.