Mercury – Flushing Kit | Cooling System Maintenance Tool | Rubber, Stainless & Plastic | 44357T2Mercury Flushing Kit Cooling System Maintenance Tool Rubber, Stainless & Plastic 44357T2 Overview Keeping your cooling system clean is one of the easiest ways to extend your engines life. The Mercury Marine 44357T2 Flushing Kit lets you do just that quickly and easily. Designed for Mercury and Mariner outboards (20HP and up) and most MerCruiser sterndrives, this simple kit connects to a standard garden hose so you can flush away salt, silt, and plant