The Cummins/Onan QSK 50 G10 is a 50 L 16-cylinder turbocharged-aftercooled engine, producing up to 1491 kW. It powers generator sets from Cummins/Onan, including the QSK50 Series.
Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|
| Air filter | Dry type replaceable paper element air cleaner with restriction indicator | | — | | |
| Fuel filter | Full flow paper element filters - fuel, lube oil | | — | | |
| Oil filter | Full flow paper element filters - fuel, lube oil | | — | | |
| Battery | Batteries with connecting leads and terminals | | — | | |
| Belt | Flywheel housing & flywheel to suit single / double (optional) bearing alternator, Starting motor – Electric, Battery charging alternator | | — | | |
| Coolant | Plate type lube oil coolant inhibitor, Outboard aftercooler | | — | | |
| Oil | Cummins Full Authority electronics | 235.0 liters | — | | |
| Spark plug | | | — | | |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Parts cataloged across the Cummins/Onan QSK50 family
25| Part # | Description | Category |
|---|
| 140-3230 | Cleaner, Air (Includes Elements - See Ref. No. 25 and 26) | Air filter |
| 140-3963 | Cleaner, Air (Spec A-C Metal) | Air filter |
| 70781N | Element, Primary - Air Cleaner - Nelson - Heavy Duty | Air filter |
| 70782N | Element, Safety - Air Cleaner - Nelson - Heavy Duty | Air filter |
| AF25544 | Element, Primary - Air Cleaner - Fleetguard - Heavy Duty | Air filter |
| AF25545 | Element, Safety - Air Cleaner - Fleetguard - Heavy Duty | Air filter |
| AF2559300 | Air Cleaner replacement element (Nelson), for Air Cleaner Housing 140-3737 | Air filter |
| 149-2792 | Filter, Fuel | Fuel filter |
| 149-2837 | Filter, Fuel | Fuel filter |
| 149-2853 | Filter, Fuel (Triplex Filter) | Fuel filter |
| 543-0088 | Package, Fuel Filter | Fuel filter |
| A030M222 | Filter, Fuel (Triple Filter) | Fuel filter |
| MCBQSK0068 | Water Pump Gasket Set | Gasket |
| 501-0970-01 | Line, Fuel | Hose |
| 503-1705 | Hose, Hump | Hose |
| 503-2754-01 | Hose, Oil | Hose |
| 503-2754-02 | Hose, Oil | Hose |
| 102-1335 | Plug, Oil Drain | Service part / kit |
| 140-1260 | Fitting, Safety Filter | Service part / kit |
| 140-1548 | Indicator, Service | Service part / kit |
| M-2885786 | Cylinder Liner Kit | Service part / kit |
| M-3007525 | Cylinder Liner Kit | Service part / kit |
| M-3022157 | Cylinder Liner | Service part / kit |
| 5394933 | Crankshaft Rear Oil Seal Removal & Installation Kit | Seal |
| 6794600 | Washer, Sealing | Seal |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.