The Cummins/Onan QSB7-G7 is a 6.7 L turbocharged engine rated at 1500 rpm. It powers generator sets from Cummins/Onan and MQ Power, including the QSB7 and DCA150SSCU. It holds 17.5 L (4.6 gal) of oil and 43 L (11.4 gal) of coolant.
Also known as: Cummins QSB7-G7
Part of the Cummins/Onan QSB7 engine family — 9 variants share parts & fitment.
| Oil capacity | 17.5 L |
|---|---|
| Coolant capacity | 43.0 L |
| Displacement | 6.7 L |
| Aspiration | turbocharged |
| Rated speed | 1500 rpm |
Shared across brands: Cummins/Onan, MQ Power
How to read your Cummins/Onan engine serial & model number →
| 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.
| Part # | Description | Category |
|---|---|---|
| A047M180 | Filter, Air − Normal Duty | Air filter |
| A054E584 | Filter, Air − Heavy Duty | Air filter |
| A055Z870 | Filter, Air − Replacement − Heavy Duty | Air filter |
| 4915973 | Alternator Manual | Alternator |
| 0908-0110-00 | Health and Safety (Diesel Generator Sets) | Service part / kit |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan QSB7-G7 engine has an oil capacity of 17.5 liters.
The Cummins/Onan QSB7-G7 has a displacement of 6.7 liters.
The Cummins/Onan QSB7-G7 powers 2 generator set(s), including Cummins/Onan QSB7, MQ Power DCA150SSCU.