Cummins QSJ9.8G Generator


Frequency (Hz) 60
Certification EPA
Fuel Type NG/Propane, Natural Gas
Rated for kW kVA
Standby 125-200 156-250

Cummins Power Generation generator sets are fully integrated power generation systems providing optimum performance, reliability and versatility for stationary standby applications.


Standby Power


Engine QSJ8.9G
Bore 114.1 mm
Stroke 144.5 mm
Displacement 8.9L
Cylinder Block Cast iron, in-line 6 cylinder
Starting Voltage 12-Volt, negative ground
Fuel system Natural gas and Propane (125 and 150 kW)
Standard cooling system 125 kW - 50 °C (122 °F) ambient cooling system
150 kW - 45 °C (113 °F) ambient cooling system
175 kW - 50° C (122° F) ambient cooling system
200 kW - 45° C (113° F) ambient cooling system
Alternator Stamford UC series, Brushless, 4 pole, single bearing, revolving field
Controller PCC 2.3 with 3.3 option
Batttery capacity 850 amps standard, dual battery optional
Fuel tank NA
Generator Model Engine Model Hz Standby kVA / kW Fuel Type Spec Sheet
C125N6 QSJ8.9G 60 156 / 125 NG/Propane NAS-6298
C150N6 QSJ8.9G 60 188 / 150 NG/Propane NAS-6298
C175N6B QSJ8.9G 60 218 / 175 Natural Gas NAS-6298
C200N6B QSJ8.9G 60 250 / 200 Natural Gas NAS-6298
  • Gas engine - Rugged 6-cyclinder Cummins QSJ8.9G spark-ignited engine delivers reliable power. The electronic air/fuel ratio control provides optimum engine performance and fast response to load changes.
  • Alternator - Several alternator sizes offer selectable motor starting capability with low reactance 2/3 pitch windings, low waveform distortion with non-linear loads and fault clearing short-circuit capability.
  • Control system - The PowerCommand® 2.3 electronic control is standard equipment and provides total generator set system integration including automatic remote starting/stopping, precise frequency and voltage regulation, alarm and status message display, output metering, auto-shutdown at fault detection and NFPA 110 Level 1 compliance. The PowerCommand 3.3 control is also available as an option.
  • Cooling system - Standard cooling package provides reliable running at up to 50° C (122° F) ambient temperature.
  • Enclosures - The aesthetically appealing enclosure incorporates special designs that deliver one of the quietest generators of its kind. Aluminum material plus durable powder coat paint provides the best anti-corrosion performance. The generator set enclosure has been evaluated to withstand 180 MPH wind loads in accordance with ASCE7-10. The design has hinged doors to provide easy access for service and maintenance.
  • NFPA - The generator set accepts full rated load in a single step in accordance with NFPA 110 for Level 1 systems.
  • Warranty and service - Backed by a comprehensive warranty and worldwide distributor and dealer network.

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