The Cummins/Onan GTA50 G1 is a 50 L 16-cylinder spark ignited engine rated at 1500 rpm, producing up to 958 kW. It powers generator sets from Cummins/Onan, including the GFLA and GTA50-G1.
Also known as: Cummins GTA50 G1
Part of the Cummins/Onan GTA50 engine family — 4 variants share parts & fitment.
| Displacement | 50.0 L |
|---|---|
| Cylinders | 16 |
| Aspiration | Spark Ignited |
| Rated speed | 1500 rpm |
| Gross power | 958 kW |
How to read your Cummins/Onan engine serial & model number →
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | N/A | — | |||
| Fuel filter | N/A | — | |||
| Oil filter | Single spin-on canister-combination full flow with bypass | — | |||
| Battery | N/A | — | |||
| Belt | N/A | — | |||
| Coolant | N/A | — | |||
| Oil | Cummins Heavy-Duty Engine | 550.0 amps | — | ||
| Spark plug | N/A | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Pressure | SAE J1349 test condition: barometric pressure | 29.61 | in. Hg | 100 kPa; 300 ft (91 m) altitude |
| Pressure | SAE J1349 test condition: water pressure | 0.30 | in. Hg | 1 kPa |
| Temperature | Rating note (1): water temperature to aftercooler, or use of air-to-air aftercooler with 100 F or lower air temperature to the radiator | 32 | C (90 F) | applies to 10.5:1 / 10:1 / 11:1 note-(1) ratings |
| Temperature | Rating note (2): water temperature to aftercooler, or use of air-to-air aftercooler with 130 F or lower air temperature to the radiator | 54 | C (130 F) | applies to 8.5:1 note-(2) ratings |
| Temperature | Rating note (3): water temperature to aftercooler, or use of air-to-air aftercooler with 110 F or lower air temperature to the radiator | 32 | C (90 F) | applies to 10.5:1 note-(3) ratings |
| Temperature | Rating note (4): water temperature to aftercooler, or use of air-to-air aftercooler with 130 F or lower air temperature to the radiator | 54 | C (130 F) | applies to 8.5:1 note-(4) ratings |
| Temperature | SAE J1349 test condition: inlet air temperature | 77 | F | 25 C |
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 |
|---|---|---|---|---|---|
| Fuel | dry processed natural gas | 905 BTU per standard cubic foot (33.72 kJ/l) lower heating value, used for the tabulated ratings; deration may be required due to altitude, temperature, type of fuel or use of a catalytic converter |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
The Cummins/Onan GTA50 G1 has a displacement of 50.0 liters with 16 cylinders.
The Cummins/Onan GTA50 G1 powers 2 generator set(s), including Cummins/Onan GFLA, Cummins/Onan GTA50-G1.