Cummins
Cummins QSB3.9-G35
QSB3.9 Series
The Cummins QSB3.9-G35 is a 3.9-litre inline-4 diesel engine for generator sets, rated at 79 kVA / 63 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
- Standby Power · 50 Hz
- 79 kVA
- Electrical Output
- 63 kWe
- Cylinders
- L4
- Displacement
- 3.9 L
- Rated Speed
- 1,500 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
50 Hz1500 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Prime Power | 55.6 | 50 | 62.5 |
| Standby Power | 70 | 63 | 78.8 |
Technical Specifications
| Brand | Cummins |
| Model | QSB3.9-G35 |
| Series | QSB3.9 Series |
| Configuration | L4 |
| Cylinders | 4 |
| Displacement | 3.9 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | Unregulated |
| Country of Origin | China |
Frequently asked questions
What is the power output of the Cummins QSB3.9-G35?
The Cummins QSB3.9-G35 is rated at 79 kVA standby / 63 kVA prime at 50 Hz (1,500 rpm).
Does the QSB3.9-G35 run at 50 Hz or 60 Hz?
The Cummins QSB3.9-G35 is rated for 50 Hz (1,500 rpm).
What fuel does the Cummins QSB3.9-G35 use?
The Cummins QSB3.9-G35 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QSB3.9-G35?
The Cummins QSB3.9-G35 is an inline-4 (4-cylinder) engine with a displacement of 3.9 L.
Is the Cummins QSB3.9-G35 still in production?
Yes — the Cummins QSB3.9-G35 is a current production model.
Related Engines
Compare Cummins QSB3.9-G35
Reference
- Canonical page
- /engines/cummins-qsb39-g35
- Last database update
- 2026-05-29
- Manufacturer files
- No datasheet linked yet
Need this engine?
Haifeng Machinery supplies diesel and gas generators and engines worldwide.
Get a Quote ↗Or browse Haifeng's diesel generator sets ↗