The Cummins/Onan QSB5-G4 is a 4.5 L 4-cylinder turbo charged and charge air cooled engine rated at 1500 rpm. It powers generator sets from Cummins/Onan, including the C100D6RT. It holds 12.2 L (3.2 gal) of oil and 34 L (9.0 gal) of coolant.
Also known as: Cummins QSB5-G4
Part of the Cummins/Onan QSB5 engine family — 8 variants share parts & fitment.
| Oil capacity | 12.2 L |
|---|---|
| Coolant capacity | 34.0 L |
| Displacement | 4.5 L |
| Cylinders | 4 |
| Aspiration | Turbo charged and charge air cooled |
| Rated speed | 1500 rpm |
| Part # | Description | Category |
|---|---|---|
| 153-5720 | Battery | battery |
| 8C-3627 | Fuel Filter | fuel_filter |
| 250-0486 | Oil Filter | oil_filter |
| 101-4000 | Gasket | other_service |
| 127-0826 | Battery | other_service |
| 250-0488 | Spark Plug | other_service |
| 8C-3600 | Battery | other_service |
| 8C-3601 | Battery | other_service |
| 8C-3620 | Belt | 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 QSB5-G4 engine has an oil capacity of 12.2 liters.
The Cummins/Onan QSB5-G4 has a displacement of 4.5 liters with 4 cylinders.
The Cummins/Onan QSB5-G4 powers 1 generator set(s), including Cummins/Onan C100D6RT.