I got my new unit installed and while I'm running on plane I lose depth on the graph. I have the Y cable I'm using from my old 898 SI model that did the same thing. It is hooked up to another transducer mounted in the hull that I also used with my 898. Does anyone know if the transducer I have mounted in the hull that was compatible with my 898 will work with my new Helix 8 G3N model for depth on plane?