The Yanmar YM11986612541 is a genuine OEM thermostat cover assembly designed for a wide range of Yanmar engines, including the 3TNV70, 3TNV76, 4TNV84, 4TNV84T, 4TNV88, 4TNV88C, 4TNV94HT, 4TNV94L, 4TNV98, 4TNV98C, and 4TNV98T series. This essential component ensures the proper sealing and function of the engine's thermostat, which is crucial for regulating engine temperature and maintaining optimal performance. It is commonly utilized in Komatsu mini excavators such as the PC20MR-2, PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, PC45MR-2, PC50MR-2, and PC55MR-2, which are powered by these reliable Yanmar engines. Constructed from durable materials, this cover assembly provides reliable and long-lasting service in demanding operational environments.