The Cummins/Onan 6BTA5.9-G2 is a 5.88 L 6-cylinder turbocharged engine rated at 1500 rpm, producing up to 116 kW. It powers generator sets from AKSA and Cummins/Onan, including the ACD 150 and C110 D5. It holds 100 L (26.4 gal) of oil and 100 L (26.4 gal) of coolant.
Also known as: Cummins 6BTA5.9-G2
Part of the Cummins/Onan 6BTA5.9 engine family — 10 variants share parts & fitment.
| Oil capacity | 100.0 L |
|---|---|
| Coolant capacity | 100.0 L |
| Displacement | 5.88 L |
| Cylinders | 6 |
| Aspiration | Turbocharged |
| Rated speed | 1500 rpm |
| Gross power | 116 kW |
Shared across brands: AKSA, Cummins/Onan
How to read your Cummins/Onan engine serial & model number →
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Normal duty air filter | — | |||
| Fuel filter | Oil and fuel filter fitted, water separator | — | |||
| Oil filter | Oil and fuel filter fitted, water separator | — | |||
| Battery | Battery capacity (1x) 100 A/h | — | |||
| Belt | — | ||||
| Coolant | Coolant capacity (only engine) | 36.0 litros | — | ||
| Oil | Lubrication system oil capacity | 16.4 l | — | ||
| Spark plug | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 3824469 | fuel pump gear puller | Fuel pump |
| 3822509 | Injection Pump Bore Brush Service Tool | Injector |
| 3823276 | injector bore brush | Injector |
| 3377259 | bosch timing tool (ve) | 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 6BTA5.9-G2 engine has an oil capacity of 100.0 liters.
The Cummins/Onan 6BTA5.9-G2 has a displacement of 5.88 liters with 6 cylinders.
The Cummins/Onan 6BTA5.9-G2 powers 2 generator set(s), including AKSA ACD 150, Cummins/Onan C110 D5.