The Cummins/Onan QSB7-G3 is a 6.69 L turbocharged and after-cooled engine. It powers generator sets from Cummins/Onan, including the BCC 175-50 E3A, C125D2R, C125D6e and C150D6R. It holds 4.6 L (1.2 gal) of oil.
Also known as: Cummins QSB7-G3
Part of the Cummins/Onan QSB7 engine family — 8 variants share parts & fitment.
| Oil capacity | 4.6 L |
|---|---|
| Displacement | 6.69 L |
| Aspiration | turbocharged and after-cooled |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | find | |||
| Fuel filter | — | find | |||
| Oil filter | — | find | |||
| Belt | — | find | |||
| Coolant | 6.1 L | — | |||
| Coolant filter | — | find | |||
| Oil | 4.6 L | — |
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 |
| PI144D1 | Alternator Model | alternator |
| UC274C | Alternator Model | alternator |
| UC274K | Alternator Model | alternator |
| 0908-0110-00 | Health and Safety (Diesel Generator Sets) | other_service |
| 518-0601 | Sealant, Thread (6 ml Tube) | other_service |
| V2403-M-E3BG | Engine Model | 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 5 generator set(s), including Cummins/Onan BCC 175-50 E3A, Cummins/Onan C125D2R, Cummins/Onan C125D6e, Cummins/Onan C150D6R, Cummins/Onan QSB7.