Okay, I have been reading and trying to figure a fix for my problem which appears to be many other folks problems. I put the HB on the front of my boat. It is mounted to the Terrova. I put a piece of rubber all way around the TM foot and then used hose clamp to secure the transducer to the TM. I got the filtered power cord from Hb and it still does no good. the depth goes crazy when the TM is used. goes back to normal when not in use. I ran the power to my fuse block which is ran to my cranking battery. My terrova has its own 2 batteries in another compartment. Any help on how to solve this issue?

