OTTO Excavator Spare Parts Nkr77 4Jh1 Thermostat Seat Cushion 8972161560 897216-1560 8-97216156-0 For Isuzu This OTTO Excavator Spare Part, the Nkr77 4Jh1 Thermostat Seat Cushion with part number 8972161560, is designed for Isuzu engines to help regulate and maintain the optimal operating temperature efficiently.