Key benefits Effective coverage and reliable seal: two large rectangular rubber earmuffs plus a waterproof outer cover provide full coverage of the inlet and help prevent leaks during flushing. Simple, fast connection: the cup slides onto the top of the water inlet slot; connect your hose to the connector using the supplied male attachment for quick, tool-free setup. Protects the lower unit from corrosion and debris: the double water inlet flushes out salt, sand and silt, reducing corrosion risk and helping maintain engine performance and service life. Broad practicality: designed for easy use with side water inlets on lower units, compatible with most outboard motors and Z drives. Product features Two large rectangular rubber earmuffs for a secure, flexible seal around the inlet. Waterproof outer cover to minimize leaks and keep the flushing connection watertight. Double water inlet design to deliver flushing flow that dislodges and removes salt, sand and silt. Simple cup-style attachment: slide the cup onto the inlet opening and attach the hose via the male connector for a snug fit. Compatible with side water inlets located on lower units; works with most outboard motors and Z drives. Performance and why it matters Removes corrosive salt and abrasive particles that accelerate wear on the lower unit and cooling passages. Promotes consistent cooling flow during flushing so the engine components are rinsed with clean water. Regular use reduces maintenance needs and helps extend the effective service life of the engine. Practical applications After a saltwater outing: flush the lower unit immediately at the dock to remove salt and prevent rapid corrosion. Pre-storage or winterization: run freshwater through the lower unit to clear residual debris before long-term storage. Routine maintenance at the marina: use between trips to rinse out sand and silt picked up in shallow or sandy waters. Usage notes Slide the cup onto the top of the side water inlet on the lower unit, then connect the hose to the connector using the male attachment. Designed specifically for side water inlets on lower units; compatible with most outboard motors and Z drives. Materials and build Sealing components are rubber (two large rectangular rubber earmuffs). Includes a waterproof outer cover to help prevent leaks and maintain a secure flushing connection. What this product solves Prevents buildup of salt, sand and silt that causes corrosion and reduced cooling efficiency. Eliminates awkward, messy flush procedures by providing a secure, repeatable connection to the lower unit. Helps maintain engine performance and reduces the frequency of repair and replacement caused by contaminated cooling systems.