The Cummins/Onan QSB5.9-G2 is a 5.88 L 6-cylinder turbocharged, charge air cooled engine rated at 1500 rpm. It powers generator sets from Cummins/Onan, including the QSB5.9. It holds 14.2 L (3.8 gal) of oil and 25.6 L (6.8 gal) of coolant.
Also known as: Cummins® QSB5.9-G2
Part of the Cummins/Onan QSB5.9 engine family — 11 variants share parts & fitment.
| Oil capacity | 14.2 L |
|---|---|
| Coolant capacity | 25.6 L |
| Displacement | 5.88 L |
| Cylinders | 6 |
| Aspiration | Turbocharged, Charge Air Cooled |
| Rated speed | 1500 rpm |
How to read your Cummins/Onan engine serial & model number →
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | DB9F-DB9M serial cable length (Part Number 4918418) | 1.83 | M | |
| Other | Extension DB9F to DB9M length (Part Number 3162851) | 30.48 | M | |
| Other | INLINE™5 datalink adapter current requirement | 250 | mA | at +8 VDC to +50 VDC |
| Other | USB cable length (Part Number 4918419) | 2 | M | |
| Other | USB cable length (Part Number 4918591) | 5 | M | |
| Voltage | INLINE™5 datalink adapter supply voltage (maximum) | +50 | VDC | power lamp fast flashing indicates greater than maximum |
| Voltage | INLINE™5 datalink adapter supply voltage (minimum) | +8 | VDC | power lamp slow flashing indicates less than minimum |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
⚠ A fully populated USB cable, Part Number 4918419, or DB9F-DB9M serial cable, Part Number 4918418, must be used.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
The Cummins/Onan QSB5.9-G2 engine has an oil capacity of 14.2 liters.
The Cummins/Onan QSB5.9-G2 has a displacement of 5.88 liters with 6 cylinders.
The Cummins/Onan QSB5.9-G2 powers 1 generator set(s), including Cummins/Onan QSB5.9.