Sierra International 18-3671 Thermostat Kit Sierra Thermostat Kit Contains: 18-3551 Thermostat, 18-0875 Thermostat Gasket Sierra part number: 18-3671 Interchangeable with the following: Crusader 97361, GLM 13410, Mallory 9-43154, Pleasurecraft RP026002E Temperature Rating: 142