Construction Engine
Cummins QSM11 Industrial Diesel Engine (250–400 hp)
Cummins QSM11 10.8 L 6-cylinder diesel engine, 250–400 hp (186–298 kW), 16 ratings for construction work. Each unit nameplate-verified.
Specifications
- Engine Model
- QSM11-C250 ~ C400
- Displacement
- 10.8 L
- Cylinders & Configuration
- Inline 6, 4-cycle
- Rated Power Range
- 186–298 kW (250–400 hp) @ 1800–2100 rpm
- Aspiration
- Turbocharged, air-to-air aftercooled
- Applications
- Construction
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins QSM11 is a 10.8 L 6-cylinder Cummins diesel engine supplied in 16 factory ratings from 250 hp (186 kW) to 400 hp (298 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 QSM11 rating, including the 10.8 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: QSM11 Ratings
Each entry in this section is one rating of the Cummins QSM11. 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.
QSM11-C250
QSM11-C250 — rated 186 kW (250 hp) at 2100 rpm; peak torque 1146 N·m at 1300 rpm; emissions Tier 2.
QSM11-C270
QSM11-C270 — rated 201 kW (270 hp) at 1800 rpm; peak torque 1369 N·m at 1400 rpm; emissions Tier 2.
QSM11-C280
QSM11-C280 — rated 209 kW (280 hp) at 2100 rpm; peak torque 1288 N·m at 1300 rpm; emissions Tier 2.
QSM11-C290
QSM11-C290 — rated 216 kW (290 hp) at 2100 rpm; peak torque 1481 N·m at 1400 rpm; emissions Tier 2 / Tier 3.
QSM11-C299
QSM11-C299 — rated 223 kW (299 hp) at 1800 rpm; peak torque 1708 N·m at 1400 rpm; emissions Tier 2.
QSM11-C300
QSM11-C300 — rated 224 kW (300 hp) at 2100 rpm; peak torque 1575 N·m at 1400 rpm; emissions Tier 3.
QSM11-C315
QSM11-C315 — rated 235 kW (315 hp) at 2100 rpm; peak torque 1597 N·m at 1400 rpm; emissions Tier 2.
QSM11-C320
QSM11-C320 — rated 239 kW (320 hp) at 2000 rpm; peak torque 1708 N·m at 1400 rpm; emissions Tier 2.
QSM11-C330
QSM11-C330 — rated 246 kW (330 hp) at 2100 rpm; peak torque 1674 N·m at 1400 rpm; emissions Tier 2 / Tier 3.
QSM11-C335
QSM11-C335 — rated 250 kW (335 hp) at 2100 rpm; peak torque 1791 N·m at 1400 rpm; emissions Tier 2 / Tier 3.
QSM11-C340
QSM11-C340 — rated 254 kW (340 hp) at 1800 rpm; peak torque 1708 N·m at 1400 rpm; emissions Tier 3.
QSM11-C350
QSM11-C350 — rated 261 kW (350 hp) at 2100 rpm; peak torque 1776 N·m at 1400 rpm; emissions Tier 2 / Tier 3.
QSM11-C360
QSM11-C360 — rated 268 kW (360 hp) at 2100 rpm; peak torque 1830 N·m at 1400 rpm; emissions Tier 2 / Tier 3.
QSM11-C375
QSM11-C375 — rated 280 kW (375 hp) at 2100 rpm; peak torque 1898 N·m at 1400 rpm; emissions Tier 2 / Tier 3.
QSM11-C385
QSM11-C385 — rated 287 kW (385 hp) at 1800 rpm; peak torque 1886 N·m at 1400 rpm; emissions Tier 2.
QSM11-C400
QSM11-C400 — rated 298 kW (400 hp) at 2100 rpm; peak torque 1898 N·m at 1400 rpm; emissions Tier 2 / Tier 3.
Applications
QSM11 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.
Emissions: the ratings listed here carry Tier 2 or Tier 2 / Tier 3 or Tier 3. Where a market imposes a different standard, confirm the tier before ordering, because the same model number can be built to more than one tier.
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 QSM11-C400), 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 QSM11 specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What is the power range of the QSM11?
The 16 ratings listed on this page run from 250 hp (186 kW) to 400 hp (298 kW), at governed speeds between 1800 and 2100 rpm.
What displacement and cylinder count does the QSM11 use?
Every rating in this family shares the same 10.8 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 QSM11-C385 and QSM11-C400?
QSM11-C385 is rated 287 kW (385 hp) at 1800 rpm with peak torque of 1886 N·m, while QSM11-C400 is rated 298 kW (400 hp) at 2100 rpm with 1898 N·m. 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.
Which emissions tiers are available for the QSM11?
The ratings on this page are listed as Tier 2 and Tier 2 / Tier 3 and Tier 3. Emissions tier is part of the rating definition, so state the tier your market requires when you request a quotation.
How is a QSM11 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.
