Abstract: A pump system includes an inlet port, a discharge port, a drive aperture and a drain aperture. The drive aperture and the drain aperture are interchangeable such that the pump system may be utilized on either a clockwise or counterclockwise driven propeller. A propeller gearbox driven pump drive shaft is mounted into either aperture such that the aperture which receives the drive shaft becomes the drive aperture while the other aperture becomes the drain aperture. By allowing either pumping gear to become the driver gear by receiving the drive shaft, the pump system may accommodate either a clockwise or counterclockwise propeller gearbox.