The Cummins/Onan QSK50 engine line groups 7 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 140-3230 | Cleaner, Air (Includes Elements - See Ref. No. 25 and 26) | air_filter |
| 140-3963 | Filter, Air | air_filter |
| 70781N | Element, Primary - Air Cleaner - Nelson - Heavy Duty | air_filter |
| 70782N | Element, Safety - Air Cleaner - Nelson - Heavy Duty | air_filter |
| AF25544 | Recommended air cleaner element - (heavy duty) primary element | air_filter |
| AF25545 | Recommended air cleaner element - (heavy duty) secondary element | air_filter |
| AF2559300 | Element, Replacement (Cummins Filtration Part Number) | 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 | other_service |
| 140-1260 | Fitting, Safety Filter | other_service |
| 140-1548 | Indicator, Service | other_service |
| M-2885786 | Cylinder Liner Kit | other_service |
| M-3007525 | Cylinder Liner Kit | other_service |
| M-3022157 | Cylinder Liner | other_service |
| 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.