QSB3.3 for Agriculture (Tier 3)


QSB3.3 for Agriculture (Tier 3)Cummins QSB3.3 doesn't just contradict conventional thinking about compact power - it rewrites the rules. The QSB3.3 delivers up to 110 horsepower (82 kW) in a much smaller and lighter package than any comparable 4.0- to 4.5-liter engine. Plus, it has the inherent durability you've come to expect from larger Cummins engines.

The innovative benefits of the QSB3.3 have been recognized with the prestigious title of "Diesel of the Year 2007" from a leading European publication. The engine has also been named as one of the "Top 100 New Products of 2006" by Construction Equipment Magazine in the U.S. These awards highlight the capability of the QSB3.3 to enhance the productivity of compact equipment.

With the QSB3.3, you get premium performance spanning the 80-110 hp (60-82 kW) ratings range for all your agricultural applications. It combines the proven reliability and minimal maintenance of the B3.3 with performance-enhancing features such as Cummins Quantum System electronic controls and a High Pressure Common Rail fuel system. A full range of options allow you to customize the QSB3.3 specifically to the equipment and environment where it will be used - whether it's on a farm or a fruit orchard.

To ensure that every QSB3.3 is perfectly matched to every piece of ag equipment, Cummins PowerMatch and Advisor provide expert assistance with your spec'ing and installation process.

Every QSB3.3 engine is covered by Cummins three-step warranty, one of the most comprehensive and simplest in the industry.


The QSB3.3 combines the proven reliability of the B3.3 with Cummins Quantum System electronic controls and a High Pressure Common Rail fuel system for performance previously unavailable in an industrial engine this size.

Because the QSB3.3 maintains the fuel efficiency and minimal service requirements of the B3.3, it offers the same low operating costs.


Advertised Horsepower 80-110 hp 60-82 kW
Peak Torque 274-304 lb-ft 371-412 N•m
Cylinders 4
Bore And Stroke 3.74 in x 4.53 in 95 mm x115 mm
Oil System Capacity 8.5-12.7 U.S. qt 8-12 L**
Coolant System Capacity*** 4.9 U.S. qt 4.6 L**
Aspiration Turbocharged, Charge Air Cooled
Length 27.7 in 702 mm
Width 24.3 in 616 mm
Height 29.9 in 760 mm
Weight (dry) 585 lb 265 kg

*No customer options

**L = Liters/Litres

***For engine only

Engine Finder Specifications

Certification Level Tier 3 / Stage IIIA
Power 80 - 110 hp / 60 - 82 kW
Torque 274 - 306 lb-ft / 371 - 415 N•m


Engine Model Advertised hp (kW) @ rpm Peak Torque lb-ft (N•m) @ rpm
QSB3.3  110* 110 (82) @ 2400 306 (415) @ 1600
QSB3.3  99 99 (74) @ 2600 306 (415) @ 1600
QSB3.3  99 99 (74) @ 2200 306 (415) @ 1600
QSB3.3  85 85 (63) @ 2600 274 (371) @ 1400
QSB3.3  80 80 (60) @ 2200 274 (371) @ 1400

All ratings are intermittent unless otherwise noted. Additional ratings may be available. Check with your Cummins distributor or dealer. All ratings are Tier 3 capable.

*Restricted rating.


The advanced features of the QSB3.3 provide many benefits whether you are running a farm, orchard or vineyard:

  • High Pressure Common Rail Fuel System - Dramatically reduces engine noise while providing more responsive power and better fuel efficiency at every rpm. The fuel system is capable of delivering high injection pressure of 800-1100 bar (11,600-16,000 psi).
  • In-Cylinder Combustion Technology - Meets Tier 3/Stage IIIA emissions standards without external components; is compatible with high-sulfur fuels for worldwide use.
  • Heavy-Duty Durability - The camshaft, crankshaft and rods are all made of forged steel and the pistons are a one-piece aluminum design for strength and durability.
  • Full-Authority Electronic Controls - Optimize engine performance and provide seamless integration with other components. Include advanced diagnostics.
  • Cast Iron Cylinder Block - Parent bore design with deep skirts and structural ribs to increase stiffness and resist torsional stresses.
  • Two-Valve Crossflow Cylinder Head - Designed to improve breathing and resist thermal fatigue.
  • Simple Wastegated Turbocharger - Wastegated for better low-speed performance and high-speed boost.


Minimum maintenance has been designed into every QSB3.3 engine, with oil changes up to 500 hour/6-month intervals. To make service even easier, the lube filter, fuel filter, oil fill (top or side) and dipstick can all be located on the same side.

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

Brochures Available

Title Bulletin Number Request View  
Encompass Tri-Fold Mailer 3624570 Request View  Download
Every Solution - Tier 3 Engine Brochure 4087035 Request View  Download
QSB3.3 Tier 3 for Industrial Applications Spec Sheet 4087118 Request View  Download