Thermostat Assembly – Fits Yamaha Outboard 2.5-100HP (Replaces Yamaha 66M-12411-01-00) 415HP 33770 OMC Stern Drive 230

33770 OMC Stern Drive 230 4-Stroke 1973–1990 908013

Remove the sterndrive unit from the transom assembly according to manufacturer guidelines

Mount the Tray: Secure the tray into the opening using all predrilled mounting holes with #8 wood screws to ensure a solid

Is this a genuine OEM part

and there should be no wobble or movement

Thermostat Assembly – Fits Yamaha Outboard 2.5-100HP (Replaces Yamaha 66M-12411-01-00) 415HP 33770 OMC Stern Drive 230Product Details This Yamaha Thermostat Assembly is an essential component designed to maintain proper engine operating temperature by regulating coolant flow. It is engineered for a wide range of Yamaha 4 Stroke Outboards from 2. 5 HP to 100 HP, covering models from approximately 1996 to 2023. It serves as a direct replacement for Yamaha OEM part 66M 12411 01 00 and interchanges with aftermarket references like GHmarine 66M 12411 and PWCParts 66M