As mentioned above, dont hit it with a hammer. worn brushes will do what youre saying. Relays not making ground will also do what youre saying. When (not if) it happens, disconnect the trim motor wires (blue and green coming from trim motor) in the pan of the motor. Using jumpers, ground one and feed hot to the other and the motor should run. If it doesnt, problem is in the motor. If it does, I would look at the relays as the problem.JohnJones Trolling Motor Services870 773 3474Motorguide/MinnKota/PowerPole/Lowrance/Humminbird