The Cummins/Onan QSB5-G5 is a 4.45 L 4-cylinder turbocharged engine. It powers generator sets from Cummins/Onan, including the C100 D2R and C100 D6.
Also known as: QSB5 G5, Cummins QSB5-G5
Part of the Cummins/Onan QSB5 engine family — 9 variants share parts & fitment.
| Displacement | 4.45 L |
|---|---|
| Cylinders | 4 |
| Aspiration | Turbocharged |
How to read your Cummins/Onan engine serial & model number →
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | Random frequency variation | 0.5 | % | |
| Speed | Rated speed | 1800 | rpm | |
| Temperature | Alternator standard temperature rise | 120 | C | Standby |
| Voltage | Random voltage variation | 1.0 | % | |
| Voltage | Voltage regulation, no load to full load | 1.0 | % | no load to full load |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 0179-3714 | Air Cleaner Instl | Air filter |
| PI144D1 | Alternator Model | Alternator |
| UC274C | Alternator Model | Alternator |
| UC274K | Alternator Model | Alternator |
| 8C-3627 | Fuel Filter | Fuel filter |
| 250-0486 | Oil Filter | Oil filter |
| 0100-3853-01 | Engine-Diesel (4ISBeG1) | Service part / kit |
| 0179-3628 | Radiator Assy | Service part / kit |
| 0179-4344 | Outlet Sockets Box Instl | Service part / kit |
| 0179-4365 | Fuel System Instl | Service part / kit |
| 0179-4466 | Circuit Breaker Assy | Service part / kit |
| 0179-4472 | Heater Instl | Service part / kit |
| 0179-4517 | Skid Assy (XRS) | Service part / kit |
| 0179-4542 | Battery Isolator Assy | Service part / kit |
| 0300-6029 | Accessory Instl | Service part / kit |
| 0338-0000 | Harnesses | Service part / kit |
| 0403-5265-02 | Spacer-Generator (UC274C) | Service part / kit |
| 0403-5835-02 | Skid | Service part / kit |
| 0403-5850-02 | Skid | Service part / kit |
| 0403-5962 | End Cap-Skid | Service part / kit |
| 0403-5966 | End Cap-Skid (Assy) | Service part / kit |
| 0405-8842 | Enclosure | Service part / kit |
| 101-4000 | Gasket | Service part / kit |
| 127-0826 | Battery | Service part / kit |
| 153-5720 | Battery | Service part / kit |
| 250-0488 | Spark Plug | Service part / kit |
| 8C-3600 | Battery | Service part / kit |
| 8C-3601 | Battery | Service part / kit |
| 8C-3620 | Belt | Service part / kit |
| V2403-M-E3BG | Engine Model | Service part / kit |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan QSB5-G5 has a displacement of 4.45 liters with 4 cylinders.
The Cummins/Onan QSB5-G5 powers 2 generator set(s), including Cummins/Onan C100 D2R, Cummins/Onan C100 D6.