4BTA3.9 Turbocharged Diesel Engine for Construction, Generator & Marine Use
The 4BTA3.9 is one of the most popular engines from the Cummins B Series platform.
Featuring turbocharging and air-to-air intercooling, it delivers strong low-speed torque, excellent fuel economy, and long service life.
Widely used in construction machinery, generator sets, marine applications, trucks, and special vehicles.
Technical Specifications
| Model | Rated Power (kW@rpm) | Max Torque (N·m@rpm) |
|---|---|---|
| 4BTA3.9-C80-II | 60 @ 2200 | 360 @ 1400 |
| 4BTA3.9-C100-II | 74 @ 2200 | 410 @ 1500 |
| 4BTA3.9-C125-II | 93 @ 2200 | 475 @ 1500 |
| 4BTA3.9-C130-II | 97 @ 2500 | 475 @ 1500 |
The 4BTA3.9 diesel engine is a 4-cylinder, 4-stroke, water-cooled engine with turbocharger and air intercooler.
As a representative model of the Cummins B Series, it is well-known for its high reliability, strong torque output, and excellent durability.With a displacement of 3.9 liters, the 4BTA3.9 provides stable power performance even under heavy-duty and continuous operation conditions, making it an ideal power solution for both on-road and off-road applications.
Key Features & Advantages
-
Turbocharged & Aftercooled (T/A)
Improved power density and fuel efficiency. -
Excellent Low-Speed Torque
Delivers strong torque at low RPM, ideal for construction machinery and generator sets. -
Fuel Efficient PT / Electronic Fuel System
Early models use Cummins PT fuel system; later models adopt electronic control for better efficiency. -
Long Service Life & High Reliability
Rugged cylinder block design; known in the market as a “workhorse engine”. -
Easy Maintenance & Global Parts Availability
Spare parts are widely available, reducing downtime and operating cost.
Applications
-
Construction Machinery
Loaders, excavators (small & medium), forklifts, air compressors, cranes, road machinery -
Power Generation
Diesel generator sets (typical output range: 80–100 kW) -
Commercial Vehicles
Medium-duty trucks (5–8 tons), buses, coaches, school buses -
Special Vehicles
Fire trucks, sanitation vehicles, recovery trucks -
Marine Applications
Small cargo vessels, fishing boats (main engine or auxiliary engine) -
Agricultural Machinery
Medium & large tractors, harvesters
Technical Specifications
Engine Model Series: 4BTA3.9 – II
| Model | Rated Power (kW@rpm) | Max Torque (N·m@rpm) |
|---|---|---|
| 4BTA3.9-C80-II | 60 @ 2200 | 360 @ 1400 |
| 4BTA3.9-C100-II | 74 @ 2200 | 410 @ 1500 |
| 4BTA3.9-C125-II | 93 @ 2200 | 475 @ 1500 |
| 4BTA3.9-C130-II | 97 @ 2500 | 475 @ 1500 |
Customization, OEM support, and complete engine solutions are available.
Please contact us for pricing, delivery time, and technical support.
| Model |
4BTA3.9-C100-II ,4BTA3.9-C125-II ,4BTA3.9-C130-II ,4BTA3.9-C80-II |
|---|---|
| Rated Power (kW@rpm) |
60 @ 2200 ,74 @ 2200 ,93 @ 2200 ,97 @ 2500 |
| Max Torque (N·m@rpm) |
360 @ 1400 ,410 @ 1500 ,475 @ 1500 |
| Series |
B Series |
Quality Assurance & Compliance
Warehouse Storage
Faq
A: Our company's core businesses cover the entire process of diesel engine development, assembly, modification, maintenance, and testing; the production and R&D of explosion-proof engines; the supply of Cummins spare parts, as well as overhaul and testing services, etc
A: Neutral package with strong cartons normally , or according to your requirements.
A: T/T, L/C, MoneyGram, PayPal, Cash etc
A: EXW, FOB, CFR, CIF，DDU，DDP.
A:The specific delivery time depends on the items and the quantity of your order. We will confirm it with your detailed order.
A:Yes, the warranty period is 6 months. Coverage includes core engine components. Wear-and-tear parts and failures caused by improper operation are excluded.
A: We offer professional engine customization services and can fully tailor the products to your specific requirements, with a variety of options available for pricing, specifications and configurations. The minimum order quantity (MOQ) for customized engines is 1 unit.
A:Yes, all engines undergo rigorous appearance inspections and comprehensive performance tests prior to delivery to ensure compliance with quality standards. We will also provide customers with detailed factory test videos and real-time shipping photos for full traceability.
A:Should you have any quality inquiries after receiving the goods, please contact our professional after-sales team in a timely manner and provide relevant photos and videos for verification. We will first provide efficient remote technical support to resolve your issues promptly.
For confirmed quality problems within the warranty period, we offer free repair, replacement of faulty parts or even full machine replacement services, with all associated logistics costs borne by our company.
For issues not attributable to our side, we still provide free technical guidance and supply matching spare parts; the cost of spare parts and related logistics shall be borne by the customer.
