Vetus Waterlock Type NLP50 2 in.
2 Inch Waterlock Muffler with dual stage construction. Superior silencing of exhaust noise with minimal back pressure. 360° rotatable top chamber and connectors.
Upper and lower chambers have a horizontal partition plate and a riser tube through the centre. NLP waterlock inlet is connected to the engine exhaust manifold and the outlet is coupled to the transom connector.
Exhaust gases, mixed with cooling water, are forced from the lower to upper chamber through the central riser tube and then through the outlet connector.
Vetus NLP50 Waterlock Manual