The Cummins 4BT3.9 is a 4-cylinder inline diesel engine with 3.9 liters displacement. Bore × stroke: 102mm × 120mm. Turbocharged with optional aftercooling. Mechanical fuel system with Bosch P7100 or VE-style inline pump – no ECU, no sensors. Power: 60–110 kW at 2000–2500 rpm. Max torque: 400 N·m at 1500 rpm.This B-series engine features gear-driven balancer system for smooth operation, replaceable wet cylinder liners, and high-strength cast iron block. Emissions: EU Stage I / EPA Tier 1-2 depending on pump calibration.Typical applications: skid steer loaders (Case, New Holland), 4–7 ton forklifts, irrigation pumps, air compressors, and small gensets (50–80 kVA). Also used in step vans and delivery trucks.We supply complete 4BT3.9 engines, injection pumps, injectors, and rebuild kits. Hot-tested before shipping. Provide your OEM part number for cross-reference.
