The Cummins/Onan QSX15 engine line groups 4 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| M-4376220 | Upper Gasket Set | gasket |
| M-4376221 | Lower Gasket Set | gasket |
| 3163156 | Service cable for InPower™ | other_service |
| 3822735 | Plastic bead media | other_service |
| 3886301 | InPower™ electronic service tool | other_service |
| M-5473087 | Piston Kit | piston_kit |
| M-5484414 | Piston Pin | piston_pin |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.