Thanks Super Do, No I have a very simple system, just the power, transducer and gps ant. connected to the head. I have run just the bow mount, and just drifting and it still has this problem. Humminbird has had my info since early May and say their techs are looking into the problem.

I live in Amasa, MI in the UP of Mich. Is there anyone near me that has a 998 that perhaps we could get together and compare components? I would drive to your location.