Thread: new 798

I just installed my new 798 and tried it for the first time. The first spot that I marked really surprised me when I caught 16 keepers right off the bat. My question is how far should the transducer hang below the transom ? When I loaded the boat up to leave the mount had popped up. I'm thinking I have it mounted to low. Also I've been using a Garmin 240 and the down sonar on the Hbird looks totally different. I can't tell anything from it. Other than that I love it. Very easy to use.