Part of the Cummins/Onan 4B3.9 engine family — 3 variants share parts & fitment.
| Displacement | 3.9 L |
|---|---|
| Cylinders | 4 |
| Aspiration | Natural |
| Rated speed | 1500 rpm |
| Gross power | 27 kW |
| Part # | Description | Category |
|---|---|---|
| 928-0502B | other_service | |
| 928-0506 | other_service | |
| 960-0135 | other_service | |
| 960-0504A | other_service | |
| 960-0505 | other_service | |
| 960-12 | other_service |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
This engine powers 16 generator set(s) on Facts About Generators — same parts apply.
The Cummins/Onan 4B3.9-G2 engine powers 4 machine(s), including Caterpillar 301.6C, Caterpillar 301.8C, Caterpillar 303, Caterpillar 304.
The Cummins/Onan 4B3.9-G2 has a displacement of 3.9 liters.