I have an older 798 C SI not HD. I upgraded the transducer to a 180T To try an get better images. I haven't had it in the water, but when I turn the unit on it says "transducer not installed" and goes to demo mode. I double checked the transducer number on humminbird website and should be compatable. Sonar is on. Tried 200 and 200/83 and different transducer settings. All there is is Compact side scan, quad beam, and universal. I was able to get it out of demo mode once at startup. I could hear a clicking from the ducer. Is this what i have to do everytime I use it or is it because its not in the water?
I was able to get it on the water today. It still starts in demo mode. I was able to get it out of demo. I notice I don't have water temp, Is that a seperate sensor on the larger units? I also noticed that the depth was not as stable as with the compact ducer. I was in shallow water- deepest spot was 4 foot. The unit depth bounced from 2 to 20 foot when sitting still. Is this comon with the transducer upgrade? Starting to think I wasted a bunch of money.