Cummins QSM11-G3 Generator Drive EngineProduct Description
The QSM11-G3 is a 10.8-litre, 6-cylinder, turbocharged air-air intercooled diesel engine designed for generator set applications. Built on the QSM platform with millions of verified operating hours, the G3 variant covers both 50 Hz and 60 Hz markets and is a standard prime mover choice for gensets in the 320–550 kVA range.
Applications: Stationary standby · Prime power · Continuous duty · OEM genset manufacturing
Commonly paired alternators: Stamford · Leroy-Somer · Marathon
Supply: Direct wholesale from CCEC. 100 units/month capacity. Complete Cummins generator sets also available.
Technical Specifications
| General Data | |
|---|---|
| Engine Type | 6 Cylinder In-line, 4-Stroke Diesel |
| Displacement | 10.8 L |
| Bore × Stroke | 125 × 147 mm |
| Dry Weight (with flywheel & alternator) | 993 kg |
| Wet Weight (with flywheel & alternator) | 1041 kg |
| Overall Dimensions (L × W × H) | 1312 × 930 × 1158 mm |
| Manufacture Plant | Chongqing Cummins (CCEC) |
| Performance Data | |
| Prime Power @ 1500 rpm | 257 kW |
| Standby Power @ 1500 rpm | 292 kW |
| Prime Power @ 1800 rpm | 387 kW |
| Standby Power @ 1800 rpm | 443 kW |
| Fuel Consumption @ Prime Output | 69 L/h |
| Fuel Consumption @ Standby Output | 79 L/h |
| Technical Data | |
| Aspiration | Turbocharged, Air-Air Intercooled (TAA) |
| Fuel System | Cummins PT Pump, Direct Injection |
| Emission Standard | EU Stage III |
| Compression Ratio | 16.1 : 1 |
| Firing Order | 1-5-3-6-2-4 |
| Idle Speed | 675–750 RPM |
| Maximum Friction Power | 22.4 kW |
| Electrical System | 24V |
| Cooling | Water Cooled |
| Total Coolant Volume | 34 L (9.5 L engine-only) |
| Minimum Start Temp | –12 °C (no auxiliary) |
| Governor | Electronic Control |
¹ Use wet weight for mounting and structural load calculations.
QSM11-G Series Comparison
All G-series variants share the same 10.8L platform, PT fuel system, and TAA aspiration. Differences are power calibration only.
1500 rpm — 50 Hz
| Model | Prime Power | Standby Power |
|---|---|---|
| QSM11-G1 | 234 kW (314 HP) | 257 kW (345 HP) |
| QSM11-G2 | 292 kW (391 HP) | 321 kW (430 HP) |
| QSM11-G3 | 257 kW | 292 kW |
| QSM11-G4 | 292 kW | 322 kW |
1800 rpm — 60 Hz
| Model | Prime Power | Standby Power |
|---|---|---|
| QSM11-G1 | 268 kW (359 HP) | 295 kW (395 HP) |
| QSM11-G2 | 319 kW (427 HP) | 351 kW (470 HP) |
| QSM11-G3 | 387 kW | 443 kW |
| QSM11-G4 | 426 kW | 470 kW |
Which variant to choose:
- Need 60 Hz standby in the 440–445 kW range → G3
- Need maximum 60 Hz output in the series → G4
- Need 50 Hz prime at 292 kW → G2 or G4 (similar rating)
Unsure? Send us your required kVA, frequency, and duty type — we'll confirm.
Suffix reference: T = Turbocharged · TA = Turbo + Water-Air · TAA = Turbo + Air-Air (G3 = TAA)
Replacement Compatibility
Same-model (G3 → G3): Direct replacement subject to CPL code match.
Cross-variant (e.g. G2/G4 → G3): Dimensions are identical across the G series. Review alternator matching and control settings before substitution.
From a different Cummins series: Provide existing engine CPL code and serial number — we will confirm compatibility.
Note: CPL Code is the most reliable compatibility identifier — stamped on the engine dataplate. Include it in your inquiry if available.
Parts & Service
Genuine QSM11 parts supplied:
Fuel system (PT pump, injectors, filters) · Gasket & overhaul kits · Cooling system · Turbocharger · Piston & liner kits · Electrical components · Valve train
To enquire: provide engine serial number or CPL code + part number if known.
Pre-sales: Factory visit · Technical consultation · Sample inspection
After-sales: Installation & commissioning guidance · Remote technical support · Overseas field engineers on request
Procurement & Logistics
| Item | Details |
|---|---|
| MOQ | 1 unit |
| Payment | T/T |
| Supply Capacity | 100 units / month |
| Lead Time | 15-30 days from order confirmation |
| Standard Packaging | Original Cummins wooden case |
| Export Packaging | Fumigated (ISPM-15) where required · PE film for high-density loading · Custom on request |
| Export Documents | Commercial invoice · Packing list · B/L · Certificate of origin · Form E / EUR.1 on request |
Warranty & After-Sales
Standard Cummins warranty for generator drive engines, validated through the Cummins authorised service network. Warranty period and claim conditions provided with order documentation.
Included with engine: Operation & maintenance manual · Parts catalogue · Installation guidance
Transit damage: Report within 48 hours of delivery with photographic evidence.
Wholesale & Distribution
Volume-tiered wholesale pricing provided per inquiry. Direct CCEC supply, 100 units/month. Forward scheduling available for regular buyers.
Export experience: Southeast Asia · Middle East · Africa · South Asia · South America· CIS
Distributor arrangements considered case-by-case. No formal programme — terms discussed directly.
FAQ
Q1: Is this a genuine Cummins engine?
Yes. Manufactured at CCEC (Chongqing Cummins), a Cummins Inc. joint venture with 50% US shareholding, built to Cummins global specifications.
Q2: What is the difference between G3 and G4?
At 1500 rpm: G4 prime (292 kW) vs G3 (257 kW). At 1800 rpm: G4 (426 kW prime / 470 kW standby) vs G3 (387 kW / 443 kW). Same platform, different power calibration.
Q3: What kVA genset does the QSM11-G3 correspond to?
At 0.8 PF — 1500 rpm: ~320 kVA prime / ~365 kVA standby. 1800 rpm: ~480 kVA prime / ~550 kVA standby. Final rating depends on alternator efficiency and site derating.
Q4: Does it meet my country's emission requirements?
EU Stage III certified. Many markets reference EU tiers for import — confirm your country's specific requirement before ordering.
Q5: What is the fuel consumption?
69 L/h at prime output · 79 L/h at standby. Full-load test-bench figures — actual consumption varies with load factor, altitude, and ambient temperature.
Q6: What is the minimum order?
1 unit.
Q7: How long is delivery?
15-30 days from order confirmation, subject to stock availability.
Q8: Do you supply complete generator sets?
Yes. Contact us with your kVA requirement and application details.
Q9: Can I visit the factory?
Yes — arrange in advance.
Q10: Can the QSM11-G3 be used for marine applications?
The QSM11 platform supports marine use, but G-series is configured for generator drive. Marine certification requirements vary — contact us to discuss your specific case.
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