A system that selectively alters a phase angle of an electrical generator. The system has a powered input shaft for transmitting power and an output shaft for receiving power for delivery to the electrical generator. A coupler portion interconnects the input shaft with the output shaft and transmits power therebetween. The coupler portion is selectively moveable in an axial direction between a first axial position wherein the input shaft and output shaft are disposed at a first relative angular position, and a second axial position wherein the input shaft and output shaft are disposed at a second relative angular position different than the first position.