This is my first attempt at using an electric motor to power a device. My project is redesigning a riding lawnmower to be powered with a 12V dc winch motor. It‘s purpose is to move my meat smoker for short intervals around my property. My problem is with speed control, I have none. These motors have 3 posts, f1, f2, and A. I have tried 2 different ESC’s they both have identical post connections, batt+, M,M, and batt-. When I connect a 12volt battery to the proper terminals and connect from M terminal to one of the motors F terminals, and with a jumper between the remaining f terminal and the A terminal the motor will operate but only at one speed, it makes no difference when I rotate the pot dial. Any help would be appreciated.