Cummins
Cummins QSJ2.4G
QSJ
Cummins QSJ2.4G is a 2.4 L inline-4 spark-ignited engine for natural-gas generator sets. Cummins lists the platform in EPA NSPS-certified 60 Hz sets through 40 kWe, while EPA annual certification data lists a current 52.2 kWm calibration.
Overhaul & repair parts- Manufacturer files
- 1 datasheet
- Last updated
- 2026-07-25
- Package route
- gas generator sets
- Standby Power · 60 Hz
- 50 kVA
- Electrical Output
- 40 kWe
- Cylinders
- L4
- Displacement
- 2.4 L
- Rated Speed
- 1,800 RPM
Power Ratings
kWm = mechanical shaft power · kWe = electrical output · kVA = kWe ÷ 0.8 pf
60 Hz1800 RPM
| kWm | kWe | kVA | |
|---|---|---|---|
| Standby Power | — | 40 | 50 |
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Cummins QSJ2.4G generator set context
The Cummins QSJ2.4G is listed here as a natural gas generator-drive engine for 60 Hz generator sets, with a headline 50 kVA / 40 kWe / standby rating. Use this page to compare the published engine output, electrical kWe/kVA ratings, emissions level, datasheet availability, and neighboring models before specifying an alternator, controller, enclosure, voltage, and compliance package.
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Technical Specifications
| Brand | Cummins |
| Model | QSJ2.4G |
| Series | QSJ |
| Configuration | L4 Spark Ignition |
| Cylinders | 4 |
| Displacement | 2.4 L |
| Fuel Type | Natural Gas |
| Ignition Type | Spark Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Stationary |
| Certifications | U.S. EPA NSPS |
| Country of Origin | United States |
Frequently asked questions
What is the power output of the Cummins QSJ2.4G?
The Cummins QSJ2.4G is rated at 50 kVA standby at 60 Hz (1,800 rpm).
Does the QSJ2.4G run at 50 Hz or 60 Hz?
The Cummins QSJ2.4G is rated for 60 Hz (1,800 rpm).
What fuel does the Cummins QSJ2.4G use?
The Cummins QSJ2.4G is a Natural Gas generator-set engine.
What is the displacement and cylinder configuration of the QSJ2.4G?
The Cummins QSJ2.4G is an inline-4 (4-cylinder) engine with a displacement of 2.4 L.
What emissions information is listed for the QSJ2.4G?
This record lists U.S. EPA Stationary for the Cummins QSJ2.4G. Confirm the exact engine family, model year, configuration and applicable manufacturer certification documents before specifying it for a regulated project. A database label does not establish certification of a complete generator package.
What is the catalog status of the Cummins QSJ2.4G?
The Cummins QSJ2.4G is marked active in this database. Confirm current production and availability with the manufacturer; catalog status is not a live supply check.
Are reference documents available for the QSJ2.4G?
This page links reference documents for the Cummins QSJ2.4G. Check each document's title, model coverage, revision and rating conditions before using it for selection.