Cummins INDUSTRIAL ENGINES
In ProductionCummins QSK78
QSK78 Series
Cummins QSK78 77.627 L V18 diesel engine for generator and industrial constant-speed applications. EPA annual certification data lists up to 3,312 kW mechanical power at 1800 RPM. U.S. EPA Tier 2 / U.S. EPA Interim Tier 4 / U.S. EPA Final Tier 4. Electrical ratings are stored only where an official Cummins generator-set rating card identifies the exact engine model.
Cylinders / Config
V18
Displacement
77.627 L
Mechanical & Electrical Specifications
| Brand | Cummins |
| Model | QSK78 |
| Series | QSK78 Series |
| Configuration | V18 |
| Cylinders | 18 |
| Displacement | 77.627 L |
| Fuel Type | Diesel |
| Ignition Type | Compression Ignition |
| Cooling Method | Liquid-Cooled |
| Emissions Standard | U.S. EPA Tier 2 / U.S. EPA Interim Tier 4 / U.S. EPA Final Tier 4 |
| Certifications | U.S. EPA Tier 2, U.S. EPA Interim Tier 4, U.S. EPA Final Tier 4 |
| Country of Origin | United States |
Frequently Asked Questions
What fuel does the Cummins QSK78 use?
The Cummins QSK78 is a diesel generator-set engine.
What is the displacement and cylinder configuration of the QSK78?
The Cummins QSK78 is a V18 (18-cylinder) engine with a displacement of 77.627 L.
What emissions standard does the QSK78 meet?
The Cummins QSK78 is certified to U.S. EPA Tier 2 / U.S. EPA Interim Tier 4 / U.S. EPA Final Tier 4 emissions standards.
Is the Cummins QSK78 still in production?
Yes — the Cummins QSK78 is a current production model.
Is a datasheet available for the QSK78?
Yes — an official Cummins datasheet for the Cummins QSK78 can be downloaded from this page.