Which Minn Kota would be my first question . — If it is a 5 speed unit I would look to the foot switch being contaminated with water , or worn out . — The variable speed units use a magnetic proximity switch , which will not be affected by water or wear , so I would look deeper into the possibility of a speed control / circuit board problem . — When mine went bad the motor would start to turn and just stop after about 1/8 revolution of the prop . — ( Maxxum 101 lb. ) — Hope this helps you out . — Hoss