For 9.9 15 6E5-12411 50℃ 122℉ Thermostat 6E5-12411-20 W Gasket 682-12414-A1 9.9MSH 15MSH Outboard 6E5-12411-30 This thermostat is designed for use with 9.9 to 15 horsepower outboard engines.It regulates the engine's cooling system to maintain an operating temperature of 50℃ (122℉), helping prevent overheating and supporting consistent performance in marine conditions.Compatible models include 9.9MSH, 15MSH, and other outboard engines ranging from 9.9 to 250 horsepower.It serves as a direct replacement for part numbers Sierra 18-3540, Mallory 9-43035, 688-12411-00-00, 688-12411-01-00, 688-12411-10-00, 688-12411-11-00, 6E5-12411-10-00, 6E5-12411-20-00, and 6E5-12411-30.The package includes one thermostat, one seal, and one gasket for a complete installation.Constructed for in marine environments, this component supports and efficient thermal regulation.