Keep watercraft running like new with a Moeller Professional Dual Water Feed Motor Flusher. It’s ideal for both fresh water and salt water boats. The engine flusher is specially designed for engines above 75 HP. It removes salt, minerals and other contaminants from the lower cooling system with a simple flush that slips over side water inlets on most inboard and outboard lower units. Moeller Professional Dual Water Feed Motor Flusher Designed For Engines Above 75 HP:Flush contaminates from your lower unit cooling systemBoat flusher quickly removes salt and mineral build-up with a simple flush that slips over side water inlets on most inboard and outboard lower units