QSK50 Dual Fuel engine render

QSK50 Dual Fuel for Well Servicing

Power 2250 - 2500 hp
1678 - 1864 kW
Certification EPA Tier 2, EPA Tier 4

Select an Application

Well Servicing Drilling


Parented from the legendary KTA50, the QSK50 is designed, developed, assembled and tested inhouse by Cummins. Every component on the engine is built to provide optimum performance, reliability, and versatility for oil and gas well servicing applications requiring EPA Tier 2, China Stage 3 or non-emissionized standards. The complete well servicing package is backed by Cummins service network and warranty, ensuring greater uptime availability and increased rig efficiency.

The QSK50 engine uses the Cummins MCRS Fuel System technology to deliver ratings of 2,250-2,500hp (1,678-1,864kW) at 1,900rpm while meeting US EPA Tier 2 and Tier 4 standards.

The QSK50 well servicing engines available with an optional Dual Fuel package that has been developed and tested by Cummins that allows customers to power their operations with 100 percent diesel or a mixture of diesel and natural gas whilst still meeting EPA Tier 2 and Tier 4 emissions when an aftertreatment device is installed.

The Dual Fuel controller provides dynamic system status and control with instantaneous feedback. Full FMEA (individual and with system integration), multiple alarm (high/low, shutdown) levels to improve uptime, cylinder bank balancing and Multipoint monitoring for the following:dual-fuel-substitution-rate-cropped.jpg

  • Load signal from engine ECM
  • Engine speed monitoring from engine controller
  • Exhaust gas temperature monitoring
  • Vibration monitoring
  • Ambient temperature monitoring
  • Reference gas pressure monitoring (ZPR to mixer inlet)

For more information, contact your local Cummins Distributor.

V-16, 4 Stroke Diesel

Bore 159 mm
Stroke 159 mm
Displacement 50.3 L
Aspiration Turbocharged and aftercooled
Governor Electronic
Cooling system Vertical or horizontal discharge options

These modules are to be used in continuous operation at varying load land drilling applications where maximum power is needed for short periods of time during initial starting or sudden overload. Refer to engine data sheet for additional information.

Model Advertised Power HP Speed Emissions Certification Level
QSK50 2,250 1,900 rpm US EPA Tier 2
QSK50 2,500 1,900 rpm US EPA Tier 2
QSK50 2,250 1,900 rpm US EPA Tier 4
QSK50 2,500 1,900 rpm US EPA Tier 4


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