MOELLER - MOTOR FLUSHER - 09908200 Flush contaminates from your lower unit cooling system. Quickly removes salt and mineral build-up with a simple flush that slips over side water inlets on most inboard and outboard lower units. A customer-favorite for all engines over 50 HP. Improved water flow with rectangular cups will virtually eliminate water leakage for higher-pressure flushing. For use on all lower units with side water inlets; includes Volvos.