Hydraulic tilt device for marine propulsion unit

摘要

A number of embodiments of hydraulic tilt and trim units for marine outboard drives. The devices employ a reversible fluid pump that drives a double acting cylinder to effect pivotal movement of the outboard drive between a tilted up and a tilted down position. The circuitry of the connection between the fluid pump and motor is such that the displaced fluid from the fluid motor need not flow through the pump during tilt down operation so that tilt down operation can be accomplished at a greater rate of speed than tilt up operation.