The Cummins/Onan QSB7-G9 is a 6.7 L 6-cylinder turbocharged, charge air cooled and egr engine. It powers generator sets from Cummins/Onan, including the C150D2RE and QSB7.
Also known as: Cummins QSB7-G9
Part of the Cummins/Onan QSB7 engine family — 9 variants share parts & fitment.
| Displacement | 6.7 L |
|---|---|
| Cylinders | 6 |
| Aspiration | Turbocharged, Charge Air Cooled and EGR |
How to read your Cummins/Onan engine serial & model number →
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Maintenance cycle | Other | 500 hr | Maintenance cycle 500 hours; improved from Tier 2 maintenance cycle of 250 hours | |
| 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-G9 has a displacement of 6.7 liters with 6 cylinders.
The Cummins/Onan QSB7-G9 powers 2 generator set(s), including Cummins/Onan C150D2RE, Cummins/Onan QSB7.