A used Cummins 4B3.9 engine is available for sale. This unit produces 76 HP at 2500 RPM, a highly durable 3.9-liter inline-four diesel engine and belongs to the Cummins B-Series engine family. Essentially, it is a four-cylinder version of the legendary 5.9L 6BT engine, with which it shares many of the same internal components.
The engine has been thoroughly serviced, tested, and repainted. Includes:
SAE #3 clutch housing
Flywheel
12V starter
12V alternator
New CAV injection pump installed.
Engine Serial Number 45065547
CPL #0591
Cummins 4B 3.9 Engine Specifications
| Specification Item | Details |
|---|---|
| Configuration | Inline 4-Cylinder, 4-Stroke Diesel |
| Displacement | 3.9 Liters (239 cubic inches) |
| Bore x Stroke | 4.02 in x 4.72 in (102 mm x 120 mm) |
| Block & Head Material | Cast Iron |
| Valvetrain | OHV, 2 or 4 valves per cylinder (depending on version) |
| Compression Ratio | 16.5:1 to 17.5:1 |
| Fuel System | Direct injection with a mechanical injection pump (e.g., Bosch P7100 or VE) |
| Firing Order | 1-3-4-2 |
| Oil Capacity | 10 to 11 quarts (approx. 9.5 to 10.4 liters) |
| Engine Weight | Approx. 745 to 782 lbs (338 to 355 kg) wet |
| Dimensions | 30.6″ L x 24.6″ W x 37.7″ H |
Leo Thomas –
Customer service helped me pick the right one.