I have a Minn Kota Traxxis 55lb that I received when I bought a used boat. It was working fine the first time I used it and then it suddenly just stopped working. It would work periodically when I'd move it around then stop again. I was messing with it when I got home and realized if I stand it straight up and hit the lower unit against the ground it works. Then if I move or tilt the motor it stops working until I do that again.

 

Any idea what this could be?

maybe brushes in motor