The Cummins/Onan QSJ5.9G is a 5.9 L 6-cylinder naturally aspirated or turbocharged engine rated at 1800 rpm. It powers generator sets from Cummins/Onan, including the C100 N6, C45 N6, C50 N6 and C60 N6. It holds 15.1 L (4.0 gal) of oil and 16 L (4.2 gal) of coolant.
Also known as: Cummins QSJ5.9G
Part of the Cummins/Onan QSJ5.9G engine family — 4 variants share parts & fitment.
| Oil capacity | 15.1 L |
|---|---|
| Coolant capacity | 16.0 L |
| Displacement | 5.9 L |
| Cylinders | 6 |
| Aspiration | Naturally aspirated or turbocharged |
| Rated speed | 1800 rpm |
| Part # | Description | Category |
|---|---|---|
| 3824510 | electronic cleaner | other_service |
| A047A982 | EControls GCP E-Com USB interface cable | other_service |
| A026M166 | accessory seal kit | seal |
| B180313494 | Onan C50N6 March Inspection | service_type |
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 QSJ5.9G engine has an oil capacity of 15.1 liters.
The Cummins/Onan QSJ5.9G has a displacement of 5.9 liters with 6 cylinders.
The Cummins/Onan QSJ5.9G powers 6 generator set(s), including Cummins/Onan C100 N6, Cummins/Onan C45 N6, Cummins/Onan C50 N6, Cummins/Onan C60 N6, Cummins/Onan C70 N6.