Original Yanmar thermostat with part number 128990-49800 , suitable for Yanmar YM series marine diesel engines. This thermostat helps regulate the engine coolant temperature by opening at 71°C . A faulty thermostat can cause the engine to run too cold, overheat, or warm up too slowly. This is a genuine Yanmar replacement part for the listed YM series engines. When replacing the thermostat, always check the gasket or sealing surface and replace the gasket if required. Compatibility Suitable for Yanmar: YM series 2YM15, 3YM20, 3YM30, 3YM30AE Series YM series Part number Yanmar: 128990-49800 Attributes Brand: Yanmar Condition: New Part type: Thermostat Part number: 128990-49800 Engine series: YM series Quality: Original / OEM Opening temperature: 71°C
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