The Cummins/Onan 4BTAA3.3 is a 3.3 L 4-cylinder turbocharged & charge air cooled engine rated at 1800 rpm. It powers generator sets from Cummins/Onan, including the 4BTAA3.3-G12 and 4BTAA3.3-G14.
Also known as: Cummins 4BTAA3.3
Part of the Cummins/Onan 4BTAA3.3 engine family — 10 variants share parts & fitment.
| Displacement | 3.3 L |
|---|---|
| Cylinders | 4 |
| Aspiration | Turbocharged & Charge Air Cooled |
| Rated speed | 1800 rpm |
How to read your Cummins/Onan engine serial & model number →
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Valve clearance | Check | 2000 hr | First service — Valve clearance checks not required until 2,000 hours, twice the industry standard. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | 50% (Ethylene Glycol) : 50% (Water) | 13.0 l | Cooling system design: Jacket Water cooled |
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 |
|---|---|---|
| PI144D1 | Alternator Model | alternator |
| UC274C | Alternator Model | alternator |
| UC274K | Alternator Model | alternator |
| V2403-M-E3BG | Engine Model | 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 4BTAA3.3 has a displacement of 3.3 liters with 4 cylinders.
The Cummins/Onan 4BTAA3.3 powers 2 generator set(s), including Cummins/Onan 4BTAA3.3-G12, Cummins/Onan 4BTAA3.3-G14.