The Cummins/Onan 4B3.9 is an engine. It powers generator sets from Cummins/Onan, including the DGBB, DGBC, DGCA and DGCB. It holds 11 L (2.9 gal) of oil and 21 L (5.5 gal) of coolant.
Part of the Cummins/Onan 4B3.9 engine family — 3 variants share parts & fitment.
| Oil capacity | 11.0 L |
|---|---|
| Coolant capacity | 21.0 L |
| 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.
The Cummins/Onan 4B3.9 engine has an oil capacity of 11.0 liters.
The Cummins/Onan 4B3.9 powers 4 generator set(s), including Cummins/Onan DGBB, Cummins/Onan DGBC, Cummins/Onan DGCA, Cummins/Onan DGCB.