does anybody run dual sounders while fishing? i am having problems with my two. i have a Garmin 431s,(chartplotter and sounder), on my console and i have a Garmin 300 fishfinder on the bow. both units will work in harmony some of the time but then i start to get incorrect bottom readings. once this starts the units will not correct themselves until i turn them off and then on again.

i contacted Garmin and they are telling me it is probably because both units are running at the same time. if that were the case i should have incorrect readings most of the time because most of the time both units are on at the same time. also i will experience same problem with only one unit on.

any suggestions out there. if know fix is found am thinking of switching to Raymarine.