Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 125 kW |
| Prime power | 112 kW |
| Emissions | EPA Tier 3 |
| Controller | PowerCommand 2.3 |
| Voltage options | 120/240 V, 120/208 V, 277/480 V, 347/600 V, 127/220 V |
| Phase | Single and three phase |
| Battery cranking | 850 CCA |
| Dimensions (L×W×H) | 2482×965×1321 mm |
| Dry weight | 1173 kg |
Engine
| Displacement | 4.5 L |
|---|---|
| Aspiration | Turbocharged and charge air cooled |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan QSB5| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | — | ||||
| Spark plug | — |
Service specifications
10| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | AFLEX-H (shake table test datum) | <=3.200 | g | AC156, tri-axial, 5% damping SRS |
| Other | AFLEX-V (shake table test datum) | <=1.333 | g | AC156, tri-axial, 5% damping SRS |
| Other | ARIG-H (shake table test datum) | <=2.400 | g | AC156, tri-axial, 5% damping SRS |
| Other | ARIG-V (shake table test datum) | <=0.533 | g | AC156, tri-axial, 5% damping SRS |
| Other | Ground snow load limit | 30 | psf | For indoor (covered) and outdoor (exposed) installation |
| Other | Horizontal design seismic coefficient (z/h = 0.0) | 1.440 | g | Certified seismic design level, IBC Importance IP <= 1.5, Soil Classes A-E, Risk Categories I-IV, Design Categories A-F, SDS <= 2.000 g |
| Other | SDS (g) at z/h=1 for C10 D6 - C60 D6 | 2.0 | g | Certified SDS, z/h = 1 |
| Other | SDS (g) at z/h=1 for C50 D6C - C125 D6C | 2.5 | g | Certified SDS, z/h = 1 |
| Other | ZPA-H (shake table test datum) | <=2.160 | g | AC156, tri-axial, 5% damping SRS |
| Other | ZPA-V (shake table test datum) | <=0.480 | g | AC156, tri-axial, 5% damping SRS |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What size generator is the Cummins/Onan C125 D6C?
The Cummins/Onan C125 D6C is rated 125 kW standby.
Which engine powers the Cummins/Onan C125 D6C?
The Cummins/Onan C125 D6C is powered by the Cummins/Onan QSB5 engine.
What fuel does the Cummins/Onan C125 D6C use?
The Cummins/Onan C125 D6C runs on diesel.
Parts
2| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 3666496 | Service part / kit | Amazon eBay $102.95 | ||
| AC156 | ISO 17025 Laboratory | Service part / kit | Amazon eBay |
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.
Available documents
Spec sheet — NAS-6211-EN (Cummins/Onan)Reference — 102S-103387 (The VMC Group)