Cummins
Cummins QSB5.9-G31
QSB5.9 Series
The Cummins QSB5.9-G31 is a 5.9-litre inline-6 diesel engine for generator sets, rated at 156 kVA / 125 kWe standby power at 1,500 RPM (50 Hz). It is a liquid-cooled engine built in China.
- Standby Power · 50 Hz
- 156 kVA
- Electrical Output
- 125 kWe
- Cylinders
- L6
- Displacement
- 5.9 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 | 111.1 | 100 | 125 |
| Standby Power | 138.9 | 125 | 156.3 |
Technical Specifications
| Brand | Cummins |
| Model | QSB5.9-G31 |
| Series | QSB5.9 Series |
| Configuration | L6 |
| Cylinders | 6 |
| Displacement | 5.9 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 QSB5.9-G31?
The Cummins QSB5.9-G31 is rated at 156 kVA standby / 125 kVA prime at 50 Hz (1,500 rpm).
Does the QSB5.9-G31 run at 50 Hz or 60 Hz?
The Cummins QSB5.9-G31 is rated for 50 Hz (1,500 rpm).
What fuel does the Cummins QSB5.9-G31 use?
The Cummins QSB5.9-G31 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QSB5.9-G31?
The Cummins QSB5.9-G31 is an inline-6 (6-cylinder) engine with a displacement of 5.9 L.
Is the Cummins QSB5.9-G31 still in production?
Yes — the Cummins QSB5.9-G31 is a current production model.
Is a datasheet available for the QSB5.9-G31?
Yes — an official Cummins datasheet for the Cummins QSB5.9-G31 can be downloaded from this page.
Related Engines
Compare Cummins QSB5.9-G31
Reference
- Canonical page
- /engines/cummins-qsb59-g31
- Last database update
- 2026-05-29
- Manufacturer files
- 1 datasheet linked
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