788c Humminbird Issues on my 2010 P II

If its the front mounted one, just get another one and mount it on your trolling motor, but if its the one glassed into the sump, I would hook another one up and just put the transducer in the water to see if your glassed one is the problem. At least then you would know and still have time to knock that one loose and mount another. Mike

The bow unit is glassed in and not accessible, so I would buy or borrow one to try out and see if thats your issue. I was headed to divisionals last year and had an HDS unit go out, I had to buy a spare unit to get me through. I think this is the one you would need–http://fishfinders.factor…mminbird-xtm-9-20-t.html

highway wrote: I sent my unit to the Humminbird factory. They did not find anything wrong so the only thing they done was to down load the latest software information. I took out the boat and it still does the same thing. So the only thing I can think of that it is my transducer. They asked me about sending in my transducer but I advised that the transducer was installed by Basscat and was epoxied in. They said they could not send me a transducer with out checking out the old one. Is there anything I can do. I have a tourney to go to in 9 days. Thanks,Highway, I am sending you a PM requesting additional details regarding your set up of the 788c unit and you getting a transducer to test. Thank you,Deborah@ Humminbird

I had the same issues with both a 787 and a 797 I had on my Baycat, they never would read the bottom depth with any consistancy. I sent the 787 back to the factory and they installed some new software which helped somewhat. The best tip I got from someone on the BBC, was to take it off of “auto”mode and set the max depth yourself. Once I did that, both units worked fine.