The Cummins/Onan 6BT5.9-G6 is a 5.9 L 6-cylinder turbocharged engine rated at 1800 rpm, producing up to 126.8 kW. It powers generator sets from Cummins/Onan, including the 100DGDB, 80DGDA and D GDB. It holds 16.4 L (4.3 gal) of oil and 24.6 L (6.5 gal) of coolant.
| Oil capacity | 16.4 L |
|---|---|
| Coolant capacity | 24.6 L |
| Displacement | 5.9 L |
| Cylinders | 6 |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
| Gross power | 126 kW |