Camco 65506 Do-It-Yourself Inboard Boat Winterizing KitThe Camco 65506 Inboard Boat Winterizing Kit provides a convenient way to flush and prepare an inboard engine's raw-water cooling system for seasonal storage. Designed for boats with a compatible thru-hull water intake, the system can be used with many direct-drive and V-drive inboard installations.The multi-valve assembly allows the engine to run on fresh water until it reaches operating temperature. Once the thermostat opens, the cooling-system supply can be switched from fresh water to marine antifreeze without disconnecting the system. This helps replace water inside the engine block and raw-water cooling passages before freezing temperatures arrive.Product Features Designed for winterizing compatible inboard marine engines; Suitable for many direct-drive and V-drive boat installations; Flushes particulates and impurities from the raw-water cooling system; Separate valves control the fresh-water and antifreeze supplies; Switches from fresh water to antifreeze without disconnecting the system; Allows the engine to reach operating temperature before antifreeze is introduced; Reusable components can be flushed, dried and stored after winterization; What's Included 12" x 7" x 3-1/2" multi-valve assembly; 6' winterizing hose; 5-gallon antifreeze container; Antifreeze container hose adapter; Installation clamps; Inboard ApplicationThe Camco 65506 is intended for inboard boats with a compatible thru-hull raw-water intake. Direct drive and V-drive describe the boat's drivetrain arrangement; compatibility with this kit depends on the location and accessibility of the engine's raw-water intake. Inspect the boat's cooling-water intake configuration before beginning.How It WorksConnect the winterizing system to a fresh-water supply and compatible inboard motor flusher positioned over the boat's thru-hull water intake. Run the engine at idle until it reaches operating temperature. The multi-valve assembly is then used to close the fresh-water supply while opening the antifreeze supply, directing marine antifreeze into the engine's raw-water cooling system.What You Will Need Propylene-glycol marine engine winterizing antifreeze with burst protection of at least -50F; Fresh-water supply and garden hose; Compatible thru-hull inboard motor flusher; Recommended Inboard Motor FlusherFor compatible boats with a thru-hull water intake, we recommend the Moeller 099085-00 Pro Inboard Motor Flusher. The flusher creates a temporary water connection over the raw-water intake beneath the boat.Motor flusher and marine antifreeze are not included. Confirm that the flusher fits securely over the boat's raw-water intake before operating the engine.Important Usage Information Read the Camco instructions and engine manufacturer's winterization procedure before beginning; Position the antifreeze container as directed in the installation instructions; Allow the engine to reach operating temperature before switching to antifreeze; Operate the engine at idle during the flushing and winterization process; Maintain an adequate supply of fresh water or antifreeze to the raw-water intake; Shut down the engine immediately when the antifreeze container is empty; Flush the winterizer components with fresh water and allow them to dry before storage; View the Camco 65506 Inboard Boat Winterizer Instructions (PDF)