I have the 597 ci hd down imaging gps combo i finally got the bottom to read properly by pointing the transducer down just a notch. I was having trouble getting the correct depth at speeds higher than idle I would loose the bottom. Is it normal that when you go faster that the sonar screen still gives correct depth but the sonar is all fuzzy shouldn't it stay really clear just as if you were still ideling?

Down imaging does not work at speed, you must be at an idle.

Actually my down imaging screen is really clear at 30 mph weather it's accurate or not. I have mounted it exactly where the humminbird instructions told me to 15 inches from the prop and right at the bottom of the transom. Would you guys like a photo of how I mounted it to see if you could help

Hummingbird has a Youtube channel with lots of tips and instructional videos. There's even a few with KVD explaining how he searches for different types of structure. You'll notice in all these videos that the subjects are moving at a slow speed while scanning. SI and DI work better at slow speeds. I've also noticed on mine that just tweeking the transducer up or down gives me a better picture.

Evidently you have hull issues you are not aware of and didn't look. I have the Tracker PT 170 TX

I'll PM you with what is going on.