The Cummins/Onan QSB7-G3 is a 6.69 L turbocharged and after-cooled engine. It powers generator sets from Cummins/Onan, including the C150D6R and QSB7. It holds 4.6 L (1.2 gal) of oil.
Also known as: Cummins QSB7-G3
Part of the Cummins/Onan QSB7 engine family — 7 variants share parts & fitment.
| Oil capacity | 4.6 L |
|---|---|
| Displacement | 6.69 L |
| Aspiration | turbocharged and after-cooled |
How to read your Cummins/Onan engine serial & model number →
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | 6.1 L | — | |||
| Coolant filter | — | ||||
| Oil | 4.6 L | — | |||
| Spark plug | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's 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) | other_service |
| 518-0601 | Sealant, Thread (6 ml Tube) | other_service |
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-G3 engine has an oil capacity of 4.6 liters.
The Cummins/Onan QSB7-G3 has a displacement of 6.69 liters.
The Cummins/Onan QSB7-G3 powers 2 generator set(s), including Cummins/Onan C150D6R, Cummins/Onan QSB7.