G-drive Engine
Cummins QSK19 Generator Drive Diesel Engine (539–971 hp)
Cummins QSK19 18.9 L 6-cylinder diesel engine, 539–971 hp (402–724 kW), 15 ratings for generator drive work. Each unit nameplate-verified.
Specifications
- Engine Model
- QSK19-G14 ~ G21
- Displacement
- 18.9 L
- Cylinders & Configuration
- Inline 6, 4-cycle
- Rated Power Range
- 402–724 kW (539–971 hp) @ 1500–1800 rpm
- Aspiration
- Turbocharged Aftercooled
- Applications
- Generator Drive
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins QSK19 is a 18.9 L 6-cylinder Cummins diesel engine supplied in 15 factory ratings from 539 hp (402 kW) to 971 hp (724 kW). Every rating listed on this page is a complete engine for generator drive duty, not a generator set, and each unit ships with its serial number recorded against the specification sheet that applies to it.
Ratings in this family differ in rated speed, peak torque and emissions tier rather than in displacement or cylinder count, so the choice between them is a duty-matching question. The specifications panel and the per-rating entries on this page are generated from the same source data, so a rating quoted here can be matched directly against a delivery document.
Specifications
The specifications panel lists the family-level values that are common to every QSK19 rating, including the 18.9 L displacement and the inline 6-cylinder layout. Ratings that share displacement and cylinder count but differ in output are listed individually in the model selection section.
Model Selection: QSK19 Ratings
Each entry in this section is one rating of the Cummins QSK19. The rated power is the output at the stated speed; the peak torque figure is the value the rating develops at the lower speed shown, which is what normally decides whether a rating suits a given machine. Each rating carries a stable anchor, so a single rating can be linked or quoted directly.
QSK19-G14
QSK19-G14 — rated 402 kW (539 hp) at 1500 rpm.
QSK19-G15
QSK19-G15 — rated 405 kW (543 hp) at 1500 rpm.
QSK19-G16
QSK19-G16 — rated 445 kW (597 hp) at 1500 rpm.
QSK19-G13
QSK19-G13 — rated 451 kW (605 hp) at 1500 rpm.
QSK19-G12
QSK19-G12 — rated 503 kW (675 hp) at 1500 rpm.
QSK19-G17
QSK19-G17 — rated 505 kW (677 hp) at 1500 rpm.
QSK19-G6
QSK19-G6 — rated 520 kW (697 hp) at 1500 rpm.
QSK19-G18
QSK19-G18 — rated 564 kW (756 hp) at 1500 rpm.
QSK19-G4
QSK19-G4 — rated 574 kW (770 hp) at 1500 rpm.
QSK19-G11
QSK19-G11 — rated 606 kW (813 hp) at 1500 rpm.
QSK19-G19
QSK19-G19 — rated 606 kW (813 hp) at 1500 rpm.
QSK19-G5
QSK19-G5 — rated 608 kW (815 hp) at 1800 rpm.
QSK19-G8
QSK19-G8 — rated 608 kW (815 hp) at 1800 rpm.
QSK19-G20
QSK19-G20 — rated 668 kW (896 hp) at 1500 rpm.
QSK19-G21
QSK19-G21 — rated 724 kW (971 hp) at 1500 rpm.
Applications
QSK19 engines in this family are normally specified for generator drive work.
Generator drive: ratings here are quoted at a fixed governed speed, and the engine is matched to the alternator frame and the prime/standby duty that the site actually needs.
Verification, Documentation and Ordering
Each engine is offered with nameplate verification + load-test record per serial number. That means the model and rating printed on the engine nameplate can be checked against the record issued for that serial number before shipment, which is the point most buyers of re-rated or re-exported engines want covered.
To receive a quotation, send the exact rating from the matrix above (for example QSK19-G21), the machine or application it will drive, the quantity, and the destination port. If the rating you need is not listed, send the model and the required output and we will confirm whether it belongs to this family or to a neighbouring one.
Buyer tip: Send your QSK19 specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What is the power range of the QSK19?
The 15 ratings listed on this page run from 539 hp (402 kW) to 971 hp (724 kW), at governed speeds between 1500 and 1800 rpm.
What displacement and cylinder count does the QSK19 use?
Every rating in this family shares the same 18.9 L displacement and inline 6-cylinder, 4-cycle configuration. Ratings differ in output, rated speed and emissions tier rather than in the base engine.
What is the difference between QSK19-G20 and QSK19-G21?
QSK19-G20 is rated 668 kW (896 hp) at 1500 rpm, while QSK19-G21 is rated 724 kW (971 hp) at 1500 rpm. They use the same base engine; the higher rating is the one to specify when the driven load needs the extra torque at the lower speed.
How is a QSK19 rating ordered?
Send the exact rating shown in the model selection table, the application it will drive, the quantity and the destination port. The engine is then quoted against that rating and confirmed against its nameplate and load-test record.
