Introducting the Marco OCS3/E Pump System - A compact oil change electronic system for fixed boat installations. It is conceived for oil fill and drain operations for all on-board uses like generators, engines, transmissions, and catwalks. The electronic control adjusts the speed of the pump according to oil viscosity/temperature and increases its speed during priming. The system automatically shuts off in case of an empty tank, a short circuit, and after 30 minutes of operation. OCS is indicated for perfect cleaning of all onboard areas while avoiding leaks and dispersions on the boat floor.