MCOR 2 potentiometer for Club Car Precedent golf cart from Pedal group #1. The entry handle is fluted in the shape of an oval. When the MCOR is faulty, it will prevent the golf cart from maintaining a constant speed. This happens because the internal contacts of the MCOR are corroded and no longer provide a clean signal to the controller. Another problem may cause the golf cart to stop working due to internal micro switches failing.