The Cummins/Onan QSK23-G7 NR2 is a 23.15 L 6-cylinder turbocharged, air to air aftercooled engine rated at 1800 rpm, producing up to 910 kW. It powers generator sets from Cummins/Onan and MQ Power, including the 545DQCA, 600 DQCA, 640DQCB and 720DQCC. It holds 103 L (27.2 gal) of oil and 46.5 L (12.3 gal) of coolant.
Also known as: Cummins QSK23-G7 NR2
| Oil capacity | 103.0 L |
|---|---|
| Coolant capacity | 46.5 L |
| Displacement | 23.15 L |
| Cylinders | 6 |
| Aspiration | Turbocharged, Air to Air Aftercooled |
| Rated speed | 1800 rpm |
| Gross power | 910 kW |
Shared across brands: Cummins/Onan, MQ Power
How to read your Cummins/Onan engine serial & model number →
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan QSK23-G7 NR2.
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry, Dual Element | — | |||
| Fuel filter | 30 micron Racor ® fuel/water separator filter | — | |||
| Oil filter | 4 Spin-on, Full Flow | — | |||
| Battery | Negative 24 VDC | — | |||
| Belt | Belt Driven, Centrifugal | — | |||
| Spark plug | not specified | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
The Cummins/Onan QSK23-G7 NR2 engine has an oil capacity of 103.0 liters.
The Cummins/Onan QSK23-G7 NR2 has a displacement of 23.15 liters with 6 cylinders.
The Cummins/Onan QSK23-G7 NR2 powers 10 generator set(s), including Cummins/Onan 545DQCA, Cummins/Onan 600 DQCA, Cummins/Onan 640DQCB, Cummins/Onan 720DQCC, Cummins/Onan 750 DQCB.
A commonly reported issue on generators using the Cummins/Onan QSK23-G7 NR2 is: Over Current.