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Whether you're running a 60-acre family farm or an 8,000-acre spread, you need the precision and flexibility of full-authority electronic controls. That's where Cummins 4-cylinder and 6-cylinder QSB engines make every piece of equipment work harder, longer and better.

Ratings range from 110-275 hp, with both charge air cooled and turbocharged versions that deliver strong performance at every start. A low-maintenance filter assembly is just one of many standard features that minimize downtime for maintenance. Among the many options that let you customize your QSB are packages that reduce the overall noise level by as much as 4 dBA.

Getting the right combination to match your equipment, environment and workloads has never been easier. Cummins PowerMatch and Advisor are ready to provide expert assistance with your spec'ing and installation process.

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

QSB engines meet every Tier 2 and Stage II emissions standard and will achieve Tier 3 and Stage IIIA compliance with in-cylinder technology that maintains a compact, simple and cost-effective design solution.

 
Engine ModelAdvertised hp (kW) @ rpmPeak hp (kW) @ rpmPeak Torque lb-ft (N•m) @ rpm
QSB5.9
QSB 275*275 (205) @ 2500275 (205) @ 2300730 (990) @ 1500
QSB 240240 (179) @ 2500250 (186) @ 2300730 (990) @ 1500
QSB 240240 (179) @ 2400245 (183) @ 2300730 (990) @ 1500
QSB 230230 (172) @ 2200230 (172) @ 2200652 (884) @ 1500
QSB 220220 (164) @ 2500230 (172) @ 2300670 (908) @ 1500
QSB 217217 (162) @ 2000 217 (162) @ 2000 660 (762) @ 1500 
QSB 215215 (160) @ 2500225 (168) @ 2300655 (888) @ 1500
QSB 215215 (160) @ 2200225 (168) @ 2000692 (938) @ 1500
QSB 205205 (153) @ 2500215 (160) @ 2300625 (847) @ 1500
QSB 205205 (153) @ 2200215 (160) @ 2000685 (929) @ 1500
QSB 195193 (145) @ 2300 198 (148) @ 2200 564 (765) @ 1500 
QSB 190**190 (142) @ 2200200 (149) @ 2000658 (892) @ 1500
QSB 185185 (138) @ 2500190 (142) @ 2300575 (780) @ 1500
QSB 185185 (138) @ 2200190 (142) @ 2000575 (780) @ 1500
QSB 180**180 (134) @ 2200190 (142) @ 2000624 (846) @ 1500
QSB 173173 (129) @ 2500179 (133) @ 2300530 (700) @ 1500
QSB 173173 (129) @ 2200178 (133) @ 2000580 (719) @ 1300
QSB 165165 (123) @ 2000165 (123) @ 2000524 (694) @ 1300
QSB 155155 (116) @ 2300160 (119) @ 2000440 (597) @ 1500
QSB 155155 (116) @ 2500160 (119) @ 2300440 (597) @ 1500
QSB 155155 (116) @ 2200160 (119) @ 2000440 (597) @ 1500
QSB 140140 (104) @ 2200145 (108) @ 2000434 (589) @ 1500
QSB 130130 (97) @ 2500130 (97) @ 2300373 (506) @ 1500
QSB 130**130 (97) @ 2200132 (98) @ 2000400 (542) @ 1400
QSB4.5
QSB 110110 (82) @ 2500110 (82) @ 2500305 (414) @ 1500
QSB 110110 (82) @ 2200110 (82) @ 2200305 (414) @ 1500
QSB3.9
QSB 130130 (97) @ 2500135 (101) @ 2300355 (481) @ 1500
QSB 125125 (93) @ 2200125 (93) @ 2200355 (481) @ 1500
QSB 120120 (89) @ 2500 125 (93) @ 2300 350 (475) @ 1400 

All ratings are intermittent unless otherwise noted. Additional ratings may be available. Check with your Cummins distributor or dealer. All ratings are Tier 2 approved.
*Indicates a restricted rating.
**Indicates a continuous rating.

Cummins QSB engines are built on one of the most successful engine block designs in the world. Available in 3.9-, 4.5- and 5.9-liter sizes, and a choice of 12- or 24-valve configuration in the 6-cylinder models, there's a QSB engine with the right size, horsepower and torque to fit every type of agricultural equipment from small tractors to fruit tree shakers and berry pickers.
Specifications.
 QSB3.9QSB4.5QSB5.9
Engine TypeIn-Line, 4-CylinderIn-Line, 4-CylinderIn-Line, 6-Cylinder
Displacement238 cu in3.9 liters275 cu in4.5 liters359 cu in5.9 liters
Advertised Horsepower120-130 hp89-97 kW110 hp82 kW130-275 hp97-205 kW
Peak Torque350-355 lb-ft475-481 N•m305 lb-ft414 N•m400-730 lb-ft542-990 N•m
Bore and Stroke4.02 in x 4.75 in102 mm x 120 mm4.02 in x 5.39 in102 mm x 137 mm4.02 in x 4.72 in102 mm x 120 mm
AspirationTurbocharged and Charge Air Cooled
Oil System Capacity10 U.S. qt9.5 liters10 U.S. qt9.5 liters17 U.S. qt16.1 liters
Coolant Capacity8.3 U.S. qt7.9 liters8.3 U.S. qt102 mm x 120 mm10.5 U.S. qt9.9 liters
Length30.6 in777 mm30.6 in777 mm40.0 in1017 mm
Width24.9 in632 mm24.9 in632 mm26.9 in684 mm
Height37.7 in958 mm35.5 in901 mm37.7 in958 mm
Weight (Wet)745 lb338 kg745 lb338 kg952-1056 lb432-479 kg

The QSB features a cast-iron parent bore block structurally designed to reduce noise and increase durability. An integrated water pump, lube pump, and cooler housings and coolant bypass eliminate possible leak points.
  • Full-Authority Electronic Controls - Optimize engine performance and provide seamless integration with other components, advanced diagnostics, plus a complete set of programming options.
  • A Deep, Stiff Crankcase With Structural Ribs - For lower noise and increased life.
  • Wastegated HX35 Turbocharger - Wastegated design optimizes operation across the torque curve with improved response.
  • Low-Maintenance Fuel Filter Assembly - The fuel filter incorporates an integral water separator and water-in-fuel sensor. 500-hour filter life with easy top-load replacement using standard Fleetguard® filters.
  • Centered Injectors With Symmetrical Piston Bowls - For improved airflow and even fuel dispersion, resulting in increased power, improved transient response and reduced fuel consumption on 24-valve versions of the QSB.

Options for the QSB include:
  • Noise Reduction Packages - Up to 4 dBA less noise reduction
  • 300-Watt Fuel Heater - Can be integrated into the fuel filter assembly for improved cold-weather starting
  • Flywheels
  • Flywheel Housings
  • Starters
  • Oil Fill Options
  • Alternators
  • Oil Pans
  • Air Handling Options
  • Cooling System Options
  • Accessory Mounting Options
  • Fan Drive Options
Maintenance Intervals.

QSB engines are designed to run up to 250 hours/6 months for turbocharged engines and 500 hours/6 months for charge air-cooled engines between scheduled maintenance stops.

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

The base warranty includes full coverage on every QSB 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 agriculture 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 partners with OEM engineers to test and match the power of the QSB engine to specific equipment models and applications. We use our advanced electronics to shape power curves and ratings to match the jobs your equipment will be doing, taking into account the working environment, load factors, ambient temperatures and operating modes. Then we optimize the engine's performance with other equipment components, using Advisor.
Advisor.

Advisor software builds a virtual model to make sure every system (air, intake, exhaust, cooling) is integrated for optimum performance. It takes into account everything from load factors to operating climates to duty cycles - then identifies systems or components that could negatively impact reliability - listing alternatives that will deliver the performance you expect the first time - every time.