Marine Single-screw Pump Inquiry The GF type marine single-screw pump is horizontal structure,driven by marine motor.It is used on the boat to deliver such mediocre as sewage,fuel and lubricating oil. Viewed from the driving end,this pump rotates in counterclockwise direction. Installed with trolley,electrical startup box,cables,fast connector and suction/drainage hose,this pump may used as movable pump.
