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The QSC meets Tier 3 and Stage IIIA emissions standards, by using in-cylinder technology, a simple and cost-effective solution that maintains the proven performance, dependability and durability of the QSC while operating cleanly and efficiently.

Cummins QSC engines are built on one of the world's most successful - and durable - engine block designs. In fact, there are over three quarters of a million in use around the globe every day.

The QSC advanced electronics provide enhanced engine performance with higher torque and better throttle response at every rpm. Electronic engine control provides additional advantages that include increased fuel economy, precision diagnostics and engine protection. The QSC also offers enhanced maintenance intervals, improved cold starting plus up to 50% quieter operation for improved operator comfort.

Available in a range of ratings from 205-305 hp (153-227 kW), the QSC meets every Tier 3 and Stage IIIA emissions standard without compromise.

The QSC offers a wide range of standard features. And options like REPTO (Rear Engine Power Take-Off) add broad functionality.

To ensure that every QSC is perfectly matched to every piece of equipment, Cummins PowerMatch and Advisor are ready to provide expert assistance with your spec'ing and installation process.

Cummins has so much confidence in the reliability of our Stage IIIA engines - and the rapid response capability of our service network - we offer an Uptime Guarantee on equipment purchased, registered and operated in EU countries from May 1, 2007 through April 30, 2008. If your engine is out of service and it can't be repaired within 48 hours from fault diagnosis, you will receive a parts and service credit equivalent to 500 Euros on the future purchase of Cummins parts or service. See the European Stage IIIA Uptime Guarantee for registration requirements and terms.

Every QSC engine is covered by Cummins three-step warranty, one of the most comprehensive and simplest plans in the industry.

To view and print a PDF file of our QSC brochure, click here.

 
Engine ModelAdvertised hp (kW) @ rpmPeak hp hp (kW) @ rpmPeak Torque lb-ft (N•m) @ rpm
QSC 305305 (227) @ 2200333 (248) @ 20001020 (1383) @ 1500
QSC 305305 (227) @ 2100320 (239) @ 19001020 (1383) @ 1500
QSC 300300 (224) @ 2200333 (248) @ 20001008 (1367) @ 1500
QSC 300300 (224) @ 2100320 (239) @ 19001000 (1356) @ 1500
QSC 290290 (216) @ 2200310 (231) @ 2000940 (1274) @ 1500
QSC 280280 (209) @ 2200300 (224) @ 20001000 (1356) @ 1500
QSC 280280 (209) @ 2100300 (224) @ 19001000 (1356) @ 1500
QSC 275275 (205) @ 2200290 (216) @ 2000895 (1213) @ 1500
QSC 260260 (194) @ 2200280 (209) @ 2000870 (1180) @ 1500
QSC 260260 (194) @ 1900280 (209) @1900830 (1125) @ 1400
QSC 250250 (186) @ 2200265 (197) @ 2000830 (1125) @ 1500
QSC 245245 (183) @ 2200278 (207) @ 2000857 (1162) @ 1500
QSC 245*245 (183) @ 1800245 (183) @ 1800870 (1180) @ 1400
QSC 240240 (179) @ 2200260 (194) @ 2000800 (1085) @ 1500
QSC 230230 (172) @ 2200250 (186) @ 2000800 (1085) @ 1500
QSC 215215 (160) @ 2200230 (172) @ 2000675 (915) @ 1500
QSC 205 205 (153) @ 1950223 (166) @ 1800745 (1010) @ 1450 
 All ratings are intermittent unless otherwise noted. Additional ratings may be available. Check with your Cummins distributor or dealer.
*Indicates continous rating

The QSC 24-valve cylinder head, High-Pressure Common-Rail (HPCR) fuel system and robust electronic controls make for a completely programmable, highly durable, highly fuel-efficient power plant. With one of the highest power-to-weight ratios and lowest cost of operation of any engine in its class. And ratings that range from 215-305 hp (160-228 kW) to deliver the power and the versatility you need to match your equipment. Every time.
Specifications.
Engine TypeIn-Line, 6-Cylinder 
Displacement506 cu in8.3 L*
Advertised Horsepower205-305 hp153-227 kW
Peak Torque675-1020 lb-ft915-1383 N•m
Bore and Stroke4.49 in x 5.31 in114 mm x 135 mm
AspirationTurbocharged and Charge Air Cooled 
Oil System Capacity21 U.S. qt19.9 L*
Coolant Capacity11 U.S. qt10.4 L*
Length44.4 in1128 mm
Width30.9 in785 mm
Height41.8 in1062 mm
Weight (wet)1,594 lb723 kg

* L = Liters/Litres

 

Standard features of the QSC include:
  • Full-Authority Electronic Controls - Provide seamless integration with other components to optimize engine operation.
  • Stiffer Block and Head - For reduced noise and vibration. Fluid circuits are integrated, replacing hoses and eliminating potential leaks.
  • High-Pressure Common-Rail Fuel System - Allows multiple injection events for cleaner, quieter operation with consistent performance at every rpm. Also improves cold-weather starting.
  • Wastegated Turbocharger - Delivers maximum power and torque.
  • Mid-Stop Cylinder Liners - Reduce cavitation and improve rebuildability.
  • Auto-Tensioning Belt Drive - Self adjusting for optimum tension, which increases fan, alternator and fan belt life.
  • Heavy-Duty Roller Followers - Cam roller followers give the QSC superior durability and cam life.
  • Two-Stage Dual Fuel Filtration - Provides a balanced level of particle separation to maximize fuel filter life and protect the vital fuel system components.
  • Gear Housing Design and Front-End Support - The gear housing and accessories mount directly to the block for improved durability.
  • Improved Piston Design - Symmetrical piston bowl combines with centered injectors to deliver optimal combustion.
  • Heavy-Duty Lube System - Targeted piston cooling and increased lube flow to the power cylinder result in increased piston reliability and durability. Improved lube and bypass filtration system increase ring and bearing life by as much as 63%.
  • Improved Crankcase Ventilation - Virtually eliminates oil carryover.
  • Valve Cover and Gasket - Isolated design with perimeter bolting for better sealing and improved reliability.
  • 12- or 24-volt electrical capacity
  • Front-mount accessory drive option available for hydraulic pumps or air compressors
  • Rear Engine Power Take-Off (REPTO) available for hydraulic pumps or air compressors
Maintenance Intervals.

Minimum maintenance has been designed into every QSC engine. A two-stage dual fuel filter approach consisting of a 10-micron filter and a pressure-side 3-micron filter maximizes fuel filter life. An integrated water pump, lube pump, and cooler housings and coolant bypass eliminate possible leak points. QSC engines are designed to run up to 500 hours between scheduled fuel and oil filter changes.

 
For complete maintenance information, please consult your Owner's Manual or Operations and Maintenance Manual.

The base warranty includes full coverage on every QSC engine and branded components, including electrics such as starters and alternators for unlimited hours during the first year of operation, extending through 2 years or 2,000 hours (whichever comes first). The base warranty also includes 3-year/10,000-hour standard protection on major components. 

Three simple steps explain everything you need to know:

Step One: Full coverage on all Cummins industrial engines and branded components with unlimited hours during the first year of operation. This includes Cummins branded electrics such as alternators, starters, etc.

Step Two: Full coverage is extended for the second year, up to 2,000 hours of operation. Total hours are cumulative from the time the engine goes in service.

Step Three: Major components coverage including block, crankshaft, camshaft and rods on all products for the third year or up to 10,000 hours of operation.

Extended coverage is available with our Encompass Protection Plans with the flexibility to meet the needs of your construction operation.  Cummins Encompass has you covered, around the clock and around the globe. 

For complete warranty details, please see the US and Canadian warranty brochure (3381321) or International warranty brochure (3381322)

Getting every installation right - the first time - is as important to Cummins as it is to you. PowerMatch and Advisor help ensure that we get it right, every time.
PowerMatch.

Cummins PowerMatch helps OEMs optimize engine performance so you can lower fuel consumption, increase operator satisfaction, improve equipment life and protect the customer's investment. PowerMatch tailors engine performance to specific equipment models and applications. Advanced electronics are used to enhance power curves and trim ratings, matching the job the equipment will be doing while taking into account variables such as work environment, load factors, ambient temperature and altitude. PowerMatch can also be used to create a unique torque curve, set up alternate governor settings or set up engine protection features.
Advisor.

Advisor puts a virtual engineer on the OEM team, allowing the OEM to focus on machine requirements instead of engine requirements. Cummins Advisor models equipment installation for exceptional productivity, reliability and durability. After a comprehensive review of load factors, climates, duty cycle and equipment usage, Cummins Advisor recommends the best engine and rating match for the equipment and operating conditions. It then builds a virtual model of the intake, exhaust, cooling, fuel and mounting systems. When Advisor identifies an issue, it lists acceptable alternatives. This approach allows changes while the equipment design is still "on paper," ensuring optimum performance while minimizing costs. Every time.

 



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