QSL9G Gas Compression Applications


QSL9G Gas Compression Applications

Wellhead compression applications require reliability and durability not found in every natural gas engine. For dependable low emission operations and world class support, you need Cummins QSL9G – an emissions compliant, high-performance natural gas engine that shares the proven heritage of the Cummins C Series diesel engines and many of the same heavy-duty components. You can depend on the QSL9G to stay emissions compliant, keep maintenance costs down and the gas flowing. Every day.


General Specifications
Inline 6-Cylinder, 4-Cycle, Natural Gas

Bore 4.49 in (114 mm)
Stroke 5.69 in (144.5 mm)
Displacement 8.9 L (543 cubic in)
Engine Power* 175 hp (131 kW)
Compression ratio 9.7:1
Aspiration Turbocharged and aftercooled
Exhaust Type Wet manifold
Weight** 1650 lb (748 kg)
Coolant capacity 2.9 gal (11 L)
Lube oil capacity 15 gal (57 L)
Rotation CWW from rear

* Rating dependent
** Weight is approximate and varies with options.

Product Finder Specifications

Power 175 hp / 130 kW


Model Rating

Compression Ratio


175 hp (131 kW) @ 1800 rpm



(1) This engine emits 2.0 gr/hp-hr NOx, 4.0 gr/hp-hr CO, 1.0 gr/hp-hr VOC. This engine does not meet the revised EPA SI NSPS requirements for non-emergency engines and is offered only for use outside the U.S.

Brochures Available

Title Bulletin Number Request View  
Cummins Power For Gas Compression Brochure 4087347 Request View  Download
QSL9G Gas Compression Applications Spec Sheet 4087379 View  Download