The Cummins/Onan GTA8.3 engine line groups 2 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 100-025-001 | Air Filter | air_filter |
| 100-029-001 | Spark plug | air_filter |
| 100-028-001 | Coolant Filter | belt |
| 100-026-001 | Filling valve (optional: without filling hoses) | oil_filter |
| 100-027-001 | Concentric suction/pressure valve (optional: without filling hoses) | oil_filter |
| 100-030-001 | Oil Filter | oil_filter |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.