OTTO Excavator Engine Parts Zx200-3 4Hk1 Sensor High Pressure Pump 8981197900 898119-7900 8-98119790-0 For Isuzu OTTO ZX200-3 excavator engine part: high pressure pump sensor (Isuzu 4HK1 engine), monitors fuel system pressure. Part nos: 8981197900, 898119-7900, 8-98119790-0