Automatic trim control system for multiple drive boats

摘要

An electrical control system is disclosed for trimming a pair of stern motors or drives mounted side-by-side on a boat. The two drives are both jointly and independently movable through a plurality of trim positions. The system includes two trim cylinders, each coupled to one associated drive, to move its associated drive to different trim positions both jointly as well as independently of each other. An operator controlled mechanism energizes and de-energizes the two trim cylinders simultaneously to jointly vary the trim position of the two drives. Two lines, each coupled at its first end to one associated drive, independently detects both the angular trim position of its associated drive with respect to the other drive as well as detects the trim position of the two drives jointly. Detection apparatus is coupled to the second end of each of the two lines and is responsive to the two lines when the two drives are not in the desired equal trim position with respect to each other for controlling switches to inactivate one of the trim cylinders and thereby moves the other of the trim cylinders with respect to the inactivated one trim cylinder until the desired equal trim position is achieved between the two drives.