The Cummins/Onan QSK78-G15 is an engine rated at 1500 rpm, producing up to 3866 kW. It powers generator sets from Cummins/Onan, including the C3750 D5.
Also known as: Cummins QSK78-G15
Part of the Cummins/Onan QSK78 engine family — 7 variants share parts & fitment.
| Rated speed | 1500 rpm |
|---|---|
| Gross power | 3866 kW |
| Part # | Description | Category |
|---|---|---|
| 0140-3963 | Filter, Air - Standard Duty | air_filter |
| A034R952 | Filter, Air - Heavy Duty | air_filter |
| A034R957 | Element, Primary - Heavy Duty | air_filter |
| A034R963 | Secondary, Primary - Heavy Duty | air_filter |
| 908-0600 | Cummins QSK78 Series Engine Operation and Maintenance Manual | other_service |
| A041X654 | Element, Replacement - Crankcase Breather | other_service |
| APCH-1007-12 | Bulletin 5600277 | 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 QSK78-G15 powers 1 generator set(s), including Cummins/Onan C3750 D5.