The Cummins/Onan QST30-G1 is a 30.5 L 12-cylinder turbocharged, aftercooled engine rated at 1800 rpm. It powers generator sets from Cummins/Onan and MQ Power, including the 700 DFHA, 750 DFHA, DFHA and QST30G1. It holds 140 L (37.0 gal) of oil and 201 L (53.1 gal) of coolant.
| Oil capacity | 140.0 L |
|---|---|
| Coolant capacity | 201.0 L |
| Displacement | 30.5 L |
| Cylinders | 12 |
| Aspiration | turbocharged, aftercooled |
| Rated speed | 1800 rpm |
Shared across brands: Cummins/Onan, MQ Power