original 166-0149 Diesel Fuel Injector for C12 Engine Excavator Truck Replacement for OEM 1660149 116-8805 0R-9530 170-5240 170-5252 187-6549 original new injector

Engineered for demanding diesel operation, this heavy-duty fuel injector carries OE reference 166-0149 and is built as a direct replacement for C12 Series inline six-cylinder diesel engines. It is equally suited for C10, 3196, and 3176 heavy-duty diesel platforms, with cross numbers including 0R-9530, 116-8805, and 123-0469, giving fleet operators and service centers a reliable sourcing option for marine, on-highway, and industrial repair programs.

The injector delivers precision fuel metering for accurate injection quantity, supporting stable power output and improved fuel economy. Fine atomization promotes complete fuel-air mixing, helping reduce black smoke and rough running, while a wear-resistant internal structure withstands the high-pressure diesel environment for extended service life. Balanced spray characteristics contribute to smooth cylinder performance across load ranges, making the unit suitable for commercial vessels, yachts, marine generator sets, excavators, loaders, mining machinery, oil and gas field power units, and agricultural heavy equipment. Sales units are flexible: single-piece supply for individual repair, or a complete six-injector set for overhaul.

Recommended maintenance includes timely fuel filter and water separator service, clean diesel fuel, and periodic diagnostic scanning to prevent nozzle wear, corrosion, and blockage. When symptoms such as hard starting, rough idle, black or white smoke, misfire, or power loss appear, perform return-flow testing, cylinder cut-out checks, and ECM data review. Installation must be carried out by a qualified diesel technician following the official service manual.