Abstract: An exterior stern steering device for inboard motor boats to adjust not only the directional movement, but also the trim of the boat. The steering strut is pivotally connected to a swivel mounting to allow movement of the strut in both the vertical and lateral directions. A shaft housing in the strut contains the propeller shaft which is pivotally connected to the power transmission shaft by a constant velocity joint to provide a direct drive mechanism capable of the requisite maneuverability for allowing angular offset between the propeller shaft and the transmission shaft as the boat is propelled forward.