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QSF2.8 (Tier 4 Final/Stage IV)


QSF2.8 (Tier 4 Final/Stage IV)

Better. In Every Dimension.

The 2.8-liter QSF delivers performance at 74 hp (55 kW), which is comparable to that provided by larger engines up to 3.6 liters, in an envelope size that’s similar to 2.2-liter engines used at 49 hp (37 kW). High Pressure Common Rail (HPCR) fuel injection, together with full-authority electronic controls and a Cummins wastegated turbocharger, combine to deliver a very impressive peak torque of 221 lb-ft (300 N•m).

This advanced technology enables the QSF2.8 to meet the near-zero emissions standards of Tier 4 Final/Stage IV using only cooled Exhaust Gas Recirculation (EGR) and our proprietary Diesel Oxidation Catalyst (DOC). The same QSF2.8 engine without the DOC meets Tier 3/Stage III emissions regulations for regions where those standards apply.

The DOC is truly “fit and forget” technology – a totally passive system that never needs any form of regeneration as required by a Diesel Particulate Filter (DPF). It also gives equipment designers the flexibility to mount components separately from the exhaust muffler or as part of a combined catalyst-and-muffler unit. Specifically designed for compact 4-cylinder applications, the CCC benefits from Cummins Emission Solutions' vast experience with DOC technology.

The compact design of the QSF2.8 includes our proprietary Direct Flow™ air cleaner, which takes up significantly less space than conventional cylindrical air filters, and has enhanced dust-holding capacity, for longer service intervals.

Innovative use of composite materials, together with a sculptured cast-iron block, give the QSF2.8-powered equipment a significant weight advantage, at just 507 lb (230 kg).

Maintenance is made simpler through remote mounting of the Electronic Control Module (ECM) for rapid plug-in diagnostics and data downloads using electronic tools such as the QuickCheck 5200. The oil fill, lube filter and fuel filter are set up for rapid service, with 500-hour intervals. Built to Cummins stringent manufacturing standards for use anywhere in the world, the QSF2.8 is smaller, stronger and simpler by design than any other engine with this output – while retaining legendary reliability and durability. In other words, it is better in every dimension.

Product Finder Specifications

Certification Level Tier 4 Final / Stage IV
Power 49 - 74 hp / 37 - 55 kW
Torque 147 - 221 lb-ft / 199 - 300 N•m


Inline 4-cylinder design, 2.8 liter displacement, EPA Tier 4 Final/EU Stage IV

Engine Model Rated Horsepower hp (kW) @ rpm Peak Torque lb-ft (Nm) @ rpm Aspiration
QSF2.8 74 74 (55) @ 2500 221 (300) @ 1600 Wastegated Turbocharger with CAC
QSF2.8 65 65 (48) @ 2500 200 (270) @ 1600 Wastegated Turbocharger with CAC
QSF2.8 65 65 (48) @ 2500 170 (230) @ 1600 Wastegated Turbocharger
QSF2.8 49 49 (37) @ 2500 147 (200) @ 1600 Wastegated Turbocharger with CAC
QSF2.8 49 49 (37) @ 2500 140 (190) @ 2500 Wastegated Turbocharger
QSF2.8 65 65 (48) @ 2200 170 (230) @ 1600 Wastegated Turbocharger
QSF2.8 49 49 (37) @ 2500 140 (190) @ 2200 Wastegated Turbocharger

Brochures Available

Title Bulletin Number Request View  
Cummins Agriculture Brochure - Growing Together (English) - A4 Format 4087328 Request View  Download
Cummins Agriculture Brochure - Growing Together (German) - A4 Format 4087329 View  Download
Cummins Clean Diesel Decal - French 4087334 Request View  Download
Cummins Engines For Rail Applications Brochure 4087364 Request View  Download
Cummins Power For Well Servicing Brochure 4087355 View  Download
Cummins Power Products Brochure 4087018 Request View  Download
Cummins Sulfur Tolerance Kit For Off-Highway Engines Flyer 4087440 Request View  Download
Engines For Maintenance Of Way Brochure 4087296 Request View  Download
High-Performance Engines For Mining Equipment Brochure 4087235 Request View  Download
QSF2.8 Folded Brochure - Europe 4087245 Request View  Download
Tier 4 Final 4-Cylinder Engines Brochure 4087302 Request View  Download
Tier 4 Final Folding Poster (12 x 38 3/4) 4087299 Request View  Download
Underground Mining Engines Brochure 4087284 Request View  Download