QSB3.3 Tier 4 Engine

Cummins' QSB3.3 engine provides up to 120 HP while also meeting Tier 4/Stage IIIB emission standards.

Qsb33 Tier4i Stageiiib Fuel 3q 10255069
Cumminslo 10108212

Cummins Inc.'s 4-cylinder QSB3.3 engine provides a 10% increase in power output compared to Tier 3 engines while also meeting Tier 4 Interim/Stage IIIB emissions standards. The small-sized engine works well in off-highway equipment such as compact excavators, skid steers, telehandlers and small cranes. 

  • Provides up to 120 hp (90 kW) with peak torque of 306 lb.-ft. (415 Nm) while reducing emissions
  • High Pressure Common Rail (HPCR) fuel system provides clean and efficient combustion, for 5% better fuel efficiency than Tier 3/Stage IIIA engine
  • Features variable flow turbocharger to improve boost across wider range of engine speeds
  • Includes a Cummins Compact Catalyst for efficient PM reduction
  • Utilizes compactly designed Exhaust Gas Recirculation (EGR) system to help meet emission standards
  • Direct Flow air filtration gives smaller installation profile and improved filtration efficiency
  • Flow Turbocharger with electronic control manages cooled EGR flow across entire rpm range
  • Provides clean operation via crankcase ventilation system with highly-efficient coalescing filter
  • Full-authority Quantum electronic controls manage all components for fully integrated system
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