The Cummins/Onan 6BT5.9 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 |
|---|---|---|
| 982-0200 | Air Filter | Air filter |
| 3824469 | fuel pump gear puller | Fuel pump |
| DM-3801372 | Gasket Set - 6BT 5.9 | Gasket |
| FP-6B59PREM | 6B/6BT5.9 In-Frame Kit w/upper gasket set & oil pan gasket | Gasket |
| FP-6B59PREML | 6B/6BT5.9 In-Frame Kit w/upper gasket set & oil pan gasket (late) | Gasket |
| FP-IFK6B59PREM | 6B/6BT5.9 In-Frame Kit w/upper gasket set & oil pan gasket | Gasket |
| FP-IFK6B59PREML | 6B/6BT5.9 In-Frame Kit w/upper gasket set & oil pan gasket (late) | Gasket |
| 3822509 | Injection Pump Bore Brush Service Tool | Injector |
| 3823276 | injector bore brush | Injector |
| DM-3029551 | Fuel Injector - 6BT 5.9 | Injector |
| LF3349 | Lube, Full-Flow Spin-On | Oil filter |
| 3377259 | bosch timing tool (ve) | Service part / kit |
| 965-0520 | Cooling Fan | Service part / kit |
| DM-3802010 | Main Bearing Set Standard - 4BT 3.9, 6BT 5.9, 6CT 8.3 | Service part / kit |
| FP-3356970 | 6B/6BT5.9 In-Frame Kit (contains FP-3802160 Piston Kit) | Service part / kit |
| FP-3356971 | 6B/6BT5.9 In-Frame Kit (contains FP-3802248 Piston Kit) | Service part / kit |
| TB1-6 | Control box terminal (TB1-6) | Service part / kit |
| TB1-7 | B+ OUTPUT | Service part / kit |
| DM-3805401 | Oil Pump - 6BT 5.9 | Pump |
| DM-3805403 | Water Pump - 4BT 3.9, 6BT 5.9 | Pump |
| S103 | Selector switch | Switch |
| DM-3015282 | Thermostat 180F - 4BT 3.9, 6BT 5.9 | Thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Leads compiled from supplier catalogs across the family’s variants; verify the exact part for your variant and serial number.