Construction Engine
Cummins QSK50 Industrial Diesel Engine (1487–2500 hp)
Cummins QSK50 50.3 L 16-cylinder diesel engine, 1487–2500 hp (1109–1864 kW), 3 ratings for construction work. Each unit nameplate-verified.
Specifications
- Engine Model
- QSK50-C1575 ~ C2250
- Displacement
- 50.3 L
- Cylinders & Configuration
- V16, 4-cycle
- Rated Power Range
- 1109–1864 kW (1487–2500 hp) @ 1800 rpm
- Aspiration
- Turbocharged Aftercooled
- Applications
- Construction
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins QSK50 is a 50.3 L 16-cylinder Cummins diesel engine supplied in 3 factory ratings from 1487 hp (1109 kW) to 2500 hp (1864 kW). Every rating listed on this page is a complete engine for construction 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 QSK50 rating, including the 50.3 L displacement and the inline 16-cylinder layout. Ratings that share displacement and cylinder count but differ in output are listed individually in the model selection section.
Model Selection: QSK50 Ratings
Each entry in this section is one rating of the Cummins QSK50. 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.
QSK50-C1575
QSK50-C1575 — rated 1109 kW (1487 hp) at 1800 rpm.
QSK50-C2000
QSK50-C2000 — rated 1491 kW (2000 hp) at 1800 rpm.
QSK50-C2250
QSK50-C2250 — rated 1864 kW (2500 hp) at 1800 rpm.
Applications
QSK50 engines in this family are normally specified for construction work.
Construction duty: the ratings with the higher peak torque are the ones normally quoted for loaders, dozers and haul trucks, where the engine has to hold torque under a sudden increase in load at low ground speed.
Duty cycle: the lower ratings in the same family are used where the duty cycle is closer to continuous and the installed package limits the cooling or the coupling that can be fitted.
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 QSK50-C2250), 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 QSK50 specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What is the power range of the QSK50?
The 3 ratings listed on this page run from 1487 hp (1109 kW) to 2500 hp (1864 kW).
What displacement and cylinder count does the QSK50 use?
Every rating in this family shares the same 50.3 L displacement and inline 16-cylinder, 4-cycle configuration. Ratings differ in output, rated speed and emissions tier rather than in the base engine.
What is the difference between QSK50-C2000 and QSK50-C2250?
QSK50-C2000 is rated 1491 kW (2000 hp) at 1800 rpm, while QSK50-C2250 is rated 1864 kW (2500 hp) at 1800 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 QSK50 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.
At what speed is the QSK50 rated?
The ratings on this page are governed at 1800 rpm. Rated speed fixes the speed the driven machine sees through its gearing, so confirm the governed speed before ordering rather than relying on the power figure alone.
Is the QSK50 a complete engine or a generator set?
Every entry on this page is a complete engine. Generator sets and packaged gen-sets are listed separately from this family and are not included here.
