The Cummins/Onan 4BT3.9 engine line groups 8 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 |
| 187-0008 | Belt, Drive | belt |
| 353-0094-01 | Connector Housing and Contact Pins, 8 Pin (Less Pins) | connector |
| 187-0011 | Filter, Fuel | fuel_filter |
| 3824469 | fuel pump gear puller | fuel_pump |
| 187-0012 | Gasket, Cover - Valve | gasket |
| FP-4B39PREM | 4B/4BT3.9 In-Frame Kit w/upper gasket set & oil pan gasket | gasket |
| FP-4B39PREML | 4B/4BT3.9 In-Frame Kit w/upper gasket set & oil pan gasket (late) | gasket |
| FP-IFK4B39PREM | 4B/4BT3.9 In-Frame Kit w/upper gasket set & oil pan gasket | gasket |
| FP-IFK4B39PREML | 4B/4BT3.9 In-Frame Kit w/upper gasket set & oil pan gasket (late) | gasket |
| 503-0365 | Heater, Engine - 750 Watt (120 volt) | heater |
| 3822509 | injector puller | injector |
| 3823276 | injector bore brush | injector |
| 0332-3925-02 | Jumper-Terminal | jumper_terminal |
| 0332-3943-02 | Jumper-Terminal | jumper_terminal |
| 140-2164 | Nut, Square (1/4-20) | nut |
| 187-0015 | Filter, Oil | oil_filter |
| 3377259 | bosch timing tool (ve) | other_service |
| 928-0502B | other_service | |
| 928-0506 | other_service | |
| 960-0135 | other_service | |
| 960-0136 | other_service | |
| 960-0242 | other_service | |
| 960-0504A | other_service | |
| 960-0505 | other_service | |
| 960-12 | other_service | |
| 965-0520 | Cooling Fan | other_service |
| 187-0020 | Pump, Injection | pump |
| 0307-3047 | Relay (24V) | relay_24v |
| 0249-0814 | Relay 2P Base | relay_2p_base |
| 323-1200 | Resistor, Fixed, Wirewound AR | resistor |
| 323-1306 | Screw, Cap - Hex Head (1/4-20 x 1/2") | screw |
| 750-1010 | Screw, Machine - Fillister Head (1/4-20 x 1") | screw |
| 800-0048 | Screw, Cap - Hex Head (3/8 - 16 X 3/4") | screw |
| 405-3826-01 | Support, Engine - Screw, Cap - Hex Head (M12 x 1.75 x 65mm) | support |
| 309-0269 | Switch, Temperature - Screw, Machine - Round Head (#8-32 x 1/4") | switch |
| 309-0561 | Switch, Temperature - Washer, Lock (#10) | switch |
| 332-2921 | Clamp, J | switch |
| 0332-3923-02 | Terminal Block | terminal_block |
| 0332-4036-02 | Terminal Block (Earth) | terminal_block |
| 0332-3927-02 | Terminal Block End Plate | terminal_block_end_plate |
| 0332-3926 | Terminal Block End Stop | terminal_block_end_stop |
| 187-0009 | Thermostat | thermostat |
| 821-0018 | Thermostat (Includes Plugs) | thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.