HomeCummins/OnanCummins/Onan C50 N6H

Cummins/Onan C50 N6H Generator Set

The Cummins/Onan C50 N6H is a 50 kW (63 kVA) standby generator set powered by a Cummins/Onan QSJ2.4 engine. It is available at 120/240 V, 120/208 V and 277/480 V, 1-phase and 60 Hz. It holds about 4.3 L (1.1 gal) of oil and 12.8 L (3.4 gal) of coolant, with a maximum ambient rating of 50 °C. Starting uses group-26 battery rated 550 CCA at 12 V. The set measures 876×34×44.2 mm (34.5×1.3×1.7 in) and weighs about 1251 kg (2758 lb).

50 kW
Standby
2.4 L
Displacement
4.3 L
Oil capacity
4
Document types

How to read your Cummins/Onan serial & model number →

Specifications

Frequency60.0 Hz
Standby power50 kW
Standby kVA63
ControllerPowerCommand 1.1
Oil capacity4.3 L
Voltage options120/240 V, 120/208 V, 277/480 V
Phase1-phase,3-phase
Battery group['26 standard', '34 high capacity']
Battery cranking550 CCA
Battery voltage12 V
Coolant capacity12.8 L
Max ambient50 °C
Dimensions (L×W×H)876×34×44 mm
Dry weight1251 kg
Wet weight1287 kg

Engine

Cummins/Onan QSJ2.4
Coolant capacity12.8 L
Displacement2.4 L
AspirationTurbocharged Aftercooled
Rated speed1800 rpm

Maintenance & consumables

for the Cummins/Onan QSJ2.4
ItemSpecCapacityPart #Interval
Fuel filterEvery 500 hours of operation or as needed, whichever comes first500 hr find
Oil filterEvery 1000 hours of operation or as needed, whichever comes first1000 hr find
Oil500 miles or 6 months, whichever comes first804 hr

Common questions

What is the power rating of the Cummins/Onan C50 N6H?

The Cummins/Onan C50 N6H is rated 50 kW standby (63.0 kVA).

What engine does the Cummins/Onan C50 N6H use?

The Cummins/Onan C50 N6H is powered by the Cummins/Onan QSJ2.4 engine.

Troubleshooting

2

Symptoms & remedies

SymptomCauseRemedy
Any spillage that occurs during fueling or during oil top-off or oil change must be cleaned up before starting the generator set.Clean up any spillage before starting the generator set.
Fire HazardContaminated insulation is a fire hazard.Remove any contaminated insulation and dispose of it in accordance with local regulations.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

13
Part #DescriptionQtySystem
A046N983Preventive Maintenance Kit –Heavy Duty2Air filter PartsGeek
A046N985Preventive Maintenance Kit (Normal Duty Air Filter)2Air filter PartsGeek
A046N987Preventive Maintenance Kit (Normal Duty Air Filter)2Air filter PartsGeek
CA115-T12Large, Oil CoolerOil filter PartsGeek
CA135-E12Large, Oil CoolerOil filter PartsGeek
A046J612Base Barrier – Elevated Genset1Service part / kit PartsGeek
A046L270Instruction Sheet1Service part / kit PartsGeek
CA115-H14SmallService part / kit PartsGeek
CA115-J12SmallService part / kit PartsGeek
CA115-L14SmallService part / kit PartsGeek
CA115-M12LargeService part / kit PartsGeek
CA115-P12LargeService part / kit PartsGeek
CA115-R12LargeService part / kit PartsGeek

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime
Standby

Available documents

Spec sheet — NAS-5706-EN (Cummins/Onan)Installation manual — 8023 rx powerconnect installmanual (Cummins/Onan)Parts manual — 77789-1301Service manual — C30N6 Service Manual (Cummins/Onan)Service manual — QSJ2.6 Generator Set Operator Manual (Cummins/Onan)Service manual — cummins-rs30-208-owners-manual (Cummins/Onan)