Oil pump manual extraction of oil from crankcase

Oil and liquid suction pump with a capacity of 6 liters.
With this spherical vacuum pump, for example, engine oil can be sucked from the crankcase of an outboard or inboard engine.
This procedure is more environmentally friendly and cleaner than draining, leaks on the ground or in the bilge are a thing of the past.
This vacuum pump can also be used for other purposes, such as emptying the bilge.
By pumping the air out of the reservoir, a vacuum is created and the liquid is sucked into the reservoir.