Specifications
| Fuel | diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 22 kW |
| Standby kVA | 27 |
| Prime power | 20 kW |
| Oil capacity | 8.0 L |
| Voltage options | 12 V |
| Coolant capacity | 11 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 1036×687×823 mm |
| Dry weight | 258 kg |
Maintenance & consumables
for the Cummins/Onan X2.5-G5| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Heavy Duty Dry replaceable element with restriction indicator | — | |||
| Fuel filter | Spin-on fuel filters with water separator | — | |||
| Oil filter | Spin-on full flow filter | — | |||
| Battery | 12-volt | — | |||
| Coolant | 50% ethylene glycol; 50% water | 11.0 l | — | ||
| Oil | 8.0 l | — |
Service intervals
2| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| valve clearance | Check | 2000 hr | B-Series (4BT3.3): valve clearance checks not required for 2000 hours, twice the industry standard | |
| engine overhaul | Other | 20000 hr | QSK23-Series: expected life cycle to 20,000 hours before first overhaul |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
1| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Temperature | Limiting ambient temp.** (°C) | 50 | °C | ** @ 13 mm H20 |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | 50% ethylene glycol; 50% water | 11.0 l | Jacket Water After cooled cooling system design |
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 X2.5?
The Cummins/Onan X2.5 is rated 22 kW standby (27.5 kVA).
What engine does the Cummins/Onan X2.5 use?
The Cummins/Onan X2.5 is powered by the Cummins/Onan X2.5-G5 engine.
What fuel does the Cummins/Onan X2.5 use?
The Cummins/Onan X2.5 runs on diesel.
How much coolant does the Cummins/Onan X2.5 hold?
The Cummins/Onan X2.5 cooling system holds 11 liters (2.9 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the oil capacity of the Cummins/Onan X2.5?
The Cummins/Onan X2.5 has an engine oil capacity of 8 liters (8.5 US quarts), per the manufacturer specification sheet.
What is the continuous rating of the Cummins/Onan X2.5?
The Cummins/Onan X2.5 is rated 20 kW prime (25 kVA), against 22 kW standby.
What is the dry weight of the Cummins/Onan X2.5?
The Cummins/Onan X2.5 has a dry weight of 258 kg (568 lb).
What voltages is the Cummins/Onan X2.5 available in?
The Cummins/Onan X2.5 is offered in 12 V.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Continuous | 100% | 4.9 | 1.3 |
| Prime | 25% | 2.5 | 0.4 |
| Prime | 50% | 3.5 | 0.7 |
| Prime | 75% | 4.8 | 1.3 |
| Prime | 100% | 6.0 | 1.6 |
| Standby | 25% | 2.5 | 0.5 |
| Standby | 75% | 5.3 | 1.4 |
| Standby | 100% | 6.5 | 1.7 |
Available documents
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.