Caterpillar original Replacement Fuel Injector 20R-1275 for Cat 3508 3512 3516 Series Engines, Cross Reference 392-0214, 392-0225, 386-1766 for Genset Marine Applications original new injector

The Caterpillar (CAT) 20R-1275 Fuel Injector Assembly is an OEM-specification high-pressure diesel fuel injection component engineered exclusively for the CAT 3512B engine platform, covering 3512B HD, 3512B Marine, and 3512B Offshore variants. Cross-referenced to part numbers 127-8216 and 1278216, it is designed to operate reliably across demanding industrial, marine, mining, power generation, and oilfield working conditions.

Functioning as a precision high-pressure fuel delivery part within the diesel combustion system, the injector completes a five-stage injection process: fuel pressurization, control signal-triggered activation, ultra-fine fuel atomization via the nozzle, air-fuel mixing in the combustion chamber, and efficient power output. It delivers accurate fuel metering, optimized spray patterns, and consistent high-pressure supply, directly boosting combustion efficiency, improving fuel economy, stabilizing engine operation, and cutting exhaust emissions.

Constructed with heavy-duty, corrosion-resistant materials and exact OEM dimensional accuracy, the injector offers high-temperature durability, superior cold-start performance, extended service intervals, and reliable performance under continuous operation. It supports standard Caterpillar maintenance protocols and fits a wide range of equipment including generator sets, marine propulsion systems, mining power units, and oil & gas drilling equipment. Available in new and remanufactured options with export-standard packaging, it reduces long-term maintenance costs and extends engine service life for global B2B operators.