1、Applicable Models: Outboard motor thermostat is fit for Outboard 25HP 25ELH CYLINDER CRANKCASE, for Outboard 9.9HP 9.9MSHB CYLINDER CRANKCASE. 2、OE Number: The part number of reference is 6E5 12411 30 00, please confirm whether it is consistent with the OE you need. 3、Improve Efficiency: By controlling the temperature of the cooling water, the thermostat can ensure that the engine is operating at the optimal operating temperature, thereby improving the efficiency of fuel combustion and reducing energy waste. 4、High Grade Metal: The thermostat is made of high grade metal material, has excellent heat resistance and oxidation resistance, and can work stably in high temperature environment. 5、Perfect Fit: The thermostat is accurately designed to fit the specific type of outboard, ensuring easy installation and a perfect fit with other components.