-100 Sterndrive Winterization Kit A comprehensive winterization kit for sterndrive boats. Fuel Stabilizer to keep the fuel fresh during the storage season. Anti-Freeze to help protect against freeze damage from water that may still be in the engine block after draining. It also protects from corrosion build up during the storage season. Changing the gear lube is good in the fall to check for water in the drive. For use on carbureted and EFI engines. Kit includes Qty - Description 1 Winterization