The Cummins/Onan QSB5 is a 4.5 L 4-cylinder turbocharged and charge air cooled engine rated at 2150 rpm. It powers generator sets from Cummins/Onan, including the C100D6, C125 D6C, C130D6B and C50 D6.
Also known as: Cummins QSB5
Part of the Cummins/Onan QSB5 engine family — 8 variants share parts & fitment.
| Displacement | 4.5 L |
|---|---|
| Cylinders | 4 |
| Aspiration | Turbocharged and charge air cooled |
| Rated speed | 2150 rpm |
| Part # | Description | Category |
|---|---|---|
| 8C-3601 | Air Filter | air_filter |
| 127-0826 | Battery | battery |
| 8C-3620 | Belt | belt |
| 8C-3600 | Coolant Filter | coolant_filter |
| 8C-3627 | Fuel Filter | fuel_filter |
| 101-4000 | Gasket | gasket |
| 250-0486 | Oil Filter | oil_filter |
| 250-0488 | Spark Plug | spark_plug |
| 153-5720 | Thermostat | thermostat |
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 has a displacement of 4.5 liters with 4 cylinders.
The Cummins/Onan QSB5 powers 10 generator set(s), including Cummins/Onan C100D6, Cummins/Onan C125 D6C, Cummins/Onan C130D6B, Cummins/Onan C50 D6, Cummins/Onan C60D6.