OTTO Excavator Parts Cxh50S 6Wa1 Thermostat Shell 8981736680 898173-6680 8-98173668-0 For Isuzu The OTTO Excavator Parts Cxh50S 6Wa1 Thermostat Shell, with part number 8981736680, is designed for Isuzu engines. It functions as a thermostat housing, ensuring proper engine temperature regulation and efficiency.