This is a genuine Mercury Marine Quicksilver factory OEM part, not aftermarket
The part 850055001 THERMOSTAT 43C / 110F is a thermostat used in Mercury Marine engines.
Description: Thermostat, set to open at 43°C (110°F).
Function: Controls the engine cooling system by regulating water flow to maintain the correct operating temperature.
Application: Commonly used in certain Mercury outboard and sterndrive models, especially where a 110°F opening temp is specified for optimal engine performance.
Compatible Engines & Serial Number Ranges
50 (3 CYL.) - 0P325500 & Up 50 (3 CYL.) - 0T980000 & Up 50 (3 CYL.) - 1B000001 & Up 55 (3 CYL.) - 0P325500 & Up 55 (3 CYL.) - 0T980000 & Up 60 (3 CYL.) - 0P325500 & Up 60 (3 CYL.) - 0T980000 & Up 40 (3 CYL.) - 0P325500 & Up 40 (3 CYL.) - 0T980000 THRU 1B208418 40 (3 CYL.) - 0T980000 THRU 1B209735 40 JET - 0P325500 & Up 40 JET - 0T980000 & Up