I bought a new Minn Kota 50lb thrust electric trolling motor 3mths ago and the left on a trip-while I was away the main pin that holds the power head to the boat bracket slipped out at least 4 times--also I can only get about 2 hours of trolling time from a fully charged 12 volt deep cycle battery--I have emailed Minn Kota twice about the problems and they have not got back to me--any suggestions would relly be appreciated--Thanks--