| 摘要 |
Disclosed herein is a marine propulsion device comprising a tilt hydraulic cylinder-piston assembly connected between a first member adapted to be attached to a boat and a second member connected to the first member for vertical swinging movement relative to the boat, and a trim hydraulic cylinder-piston assembly connected to the first and second members. Also provided is a hydraulic system connected to the tilt and trim hydraulic cylinder-piston assemblies for pressurization thereof. The hydraulic system includes an electrically operated reversible pump having opposite ports, a first flow port communicating with one of the pump ports and subject to pressure fluid when the pump is rotating in one direction, and a second flow port communicating with the other of the pump ports and subject to pressure fluid when the pump is rotating in the opposite direction. |
