A sea water connection, also known as a raw water connection, is a component found in marine engines. The sea water connection allows for the circulation of seawater through the engine's cooling system, which helps regulate the temperature of the engine and prevent overheating. The component typically includes a strainer to filter out debris and impurities from the seawater before it enters the engine. It is important to ensure that the sea water connection is properly maintained and cleaned to prevent clogging or damage to the engine.