The Cummins/Onan 6BTA5.9-G4 is a 5.9 L 6-cylinder turbocharged and aftercooled engine rated at 1800 rpm, producing up to 126.8 kW. It powers generator sets from Cummins/Onan, including the D GDA. It holds 17.3 L (4.6 gal) of oil.
| Oil capacity | 17.3 L |
|---|---|
| Displacement | 5.9 L |
| Cylinders | 6 |
| Aspiration | Turbocharged and Aftercooled |
| Rated speed | 1800 rpm |
| Gross power | 126 kW |