If the oil is coming out near the bottom of the mower engine, at the bottom of the oil dip stick tube, it is because the tube is affixed to the engine with a screw, which may have come out. The tube is just jammed into a hole near the platform that covers the blades. It can be pulled out and there supposed to be rubber ring around the bottom to make an oil-tight fit. Don't run the engine without enough oil.
JeffC
August 2007