Camco Do-It-Yourself Stern Drive Winterizing Kit. Protect your boat from harsh winter conditions. This comprehensive kit provides the ultimate solution for boat winter protection, allowing you to replace the water in your stern drive engine with boat antifreeze. A multi-valve assembly conveniently redirects the water and antifreeze flow as needed. The kit includes a 12" x 7" x 3-1/2" valve, 6' hose, 5-gallon antifreeze jug, jug hose adapter, and clamps for easy installation. Quick and simple to use, this essential marine accessory allows you to safeguard your marine equipment with confidence.