I have a Furuno 585 unit with an Airmar M260 in -Hull transducer installed on my 26' prokat. I having an issue with losing the data fee to the unit. I check the level of liquid in the tranducer and all seems fine. This happens at slow & fast speeds. I will loose data for about a minute and then start readin again but some times it stop reading for several minutes. It seems to happen more frequently in Auto mode but it still does happen in manual mode as well.