4BT3.9 Diesel Engine Assembly - Dependable Power for 50KW Generator Sets

The 4BT3.9 is a 3.9-litre inline four-cylinder turbocharged diesel engine built as a dependable prime and standby power source for 50KW generator sets. Based on the proven B-series platform, it combines a rigid cast-iron structure with precise direct injection to deliver steady output, economical fuel use and straightforward servicing in the field.

Performance Highlights

• Stable 50KW genset output - tuned for continuous duty at 1500 rpm / 1800 rpm in 50Hz and 60Hz generating systems.
• Strong low-end torque - quick load acceptance for motor starting, pumps, welding machines and site equipment.
• Economical fuel burn - direct-injection combustion keeps running costs predictable across long shifts.
• Easy maintenance - accessible service points and widely available wear parts shorten downtime.
• Long service life - hardened cylinder liners and a forged crankshaft support a long overhaul interval.

Technical Specifications

Typical Matching Applications

• Prime and standby power for 50KW generator sets in hospitals, data rooms, telecom sites and factories
• Construction site power, lighting towers and mobile workshops
• Agricultural irrigation, water pumps and grain processing equipment
• Small marine auxiliary power and deck machinery
• Forklifts and light industrial drive units

Why Buy From Us

Every engine is assembled and load-tested before shipment. We supply new, rebuilt and remanufactured options so you can match the budget of your project without giving up reliability. Engines are packed in wooden cases for safe sea transport and are backed by a 12-month warranty.

Ordering Information

To receive a quotation, send us your engine model or the power rating you need, the intended application and the quantity. If you are matching a generator set, tell us the kVA and the running frequency so we can confirm the correct rating and flywheel housing.