Ive had lowrance lmf 400 for a few years and have only had the ep60 fuel flow sensor hooked up to it, this year I added a ep70 paddle wheel speed sensor, installed it and its working but it will not display mpg ?? I have the top display box reading- water speed, middle- fuel flow, bottem- mpg. had the boat out for a test run yesterday and the water speed works and the fuel flow works but the mpg just flashes blank. Ive reset and reconfigured to no avail, ideas? Thanks -Russ
