The Cummins/Onan 4B 3.9-D(M) Configuration No. D381036MX02 is an engine. It powers generator sets from Cummins/Onan, including the 30MCGBA and 35MCGBA.
Also known as: Cummins 4B 3.9-D(M) Configuration No. D381036MX02
Part of the Cummins/Onan 4B3.9 engine family — 5 variants share parts & fitment.
How to read your Cummins/Onan engine serial & model number →
| Part # | Description | Category |
|---|---|---|
| 140-2641 | Tube, Air Cleaner | Air filter |
| 140-3218 | Cleaner Assembly, Air (Includes | Air filter |
| 982-0200 | Air Filter | Air filter |
| 300-3606 | Voltage Regulator Installation (PMG-Excited Generators), Rev. P | Avr |
| 300-3607 | Voltage Regulator Installation (Self-Excited Generators), Rev. G | Avr |
| 191-1965 | Tensioner, Belt | Belt |
| 191-2149-02 | Tensioner, Belt | Belt |
| 505-0055 | Element, Fuel | Fuel filter |
| 140-3255 | *Hose, Breather | Hose |
| 502-0827 | Fitting, Hose – Barbed (1/2” ID Pipe to 3/4” ID Hose) | Hose |
| 502-1317 | Fitting, Hose Barbed | Hose |
| 503-1707 | *Hose, Intake (2–1/2” ID) | Hose |
| 102-1490-00 | Kit, Oil Sampler (Includes | Oil filter |
| 102-1490-01 | Valve, Oil Sampler | Oil filter |
| 154-3078 | Manifold, Oil Pressure | Oil filter |
| 501-0575 | Hose Assembly, Oil (3/4–16 | Oil filter |
| 501-0685 | Line, Oil | Oil filter |
| 504-0176 | Valve, Oil Drain | Oil filter |
| 140-1260 | Fitting, Safety Filter | Service part / kit |
| 201-3434-01 | Diode, Positive (Forward) Includes Lead | Service part / kit |
| 201-3434-02 | Diode, Negative (Reverse) Includes Lead | Service part / kit |
| 220-4289-31 | Main stator assembly (broad range generators) | Service part / kit |
| 220-4289-32 | Main stator assembly (broad range generators) | Service part / kit |
| 220-4289-33 | Main stator assembly (broad range generators) | Service part / kit |
| 220-4289-34 | Main stator assembly (broad range generators) | Service part / kit |
| 220-4289-35 | Main stator assembly (broad range generators) | Service part / kit |
| 220-4298-31 | Main stator assembly | Service part / kit |
| 220-4298-32 | Main stator assembly | Service part / kit |
| 220-4298-33 | Main stator assembly | Service part / kit |
| 220-4298-34 | Main stator assembly | Service part / kit |
| 220-4298-35 | Main stator assembly | Service part / kit |
| 220-4298-36 | Main stator assembly | Service part / kit |
| 300-4111 | Auxiliary Relay Board (ARB), Rev. E | Service part / kit |
| 319-0969 | QS-Series Power Distribution Panel Wiring, Rev. G | Service part / kit |
| 3905125 | Solenoid, Fuel Shutoff – MCGGA, 24 Volt, Negative Ground Electrical System (Cummins part number) | Service part / kit |
| 3921930 | Solenoid, Fuel Shutoff – 12 Volt (Cummins part number) | Service part / kit |
| 3921976 | Solenoid, Fuel Shutoff – 24 Volt (Cummins part number) | Service part / kit |
| 502-0153 | Plug, Hex Head | Service part / kit |
| 612-6487 | 7-Light DC Control Wiring Diagram, Sh 1 and 2 of 2, Rev. V | Service part / kit |
| 612-6488 | 12-Light DC Control Wiring Diagram, Sh 1 and 2 of 2, Rev. W | Service part / kit |
| 612-6489 | AC Control Wiring Diagram (Without Meters), Rev. S, modified 6/2001 | Service part / kit |
| 612-6490 | AC Control Wiring Diagram (With Meters), Rev. ZB, modified 1/2002 | Service part / kit |
| 625-2164 | Generator Reconnection Diagrams, Sh 1 and 2 of 2, Rev. K | Service part / kit |
| 625-2256 | QS-Series Generator Connections When The Voltage Selector Switch Is Provided, Rev. B | Service part / kit |
| 965-0520 | Cooling Fan | Service part / kit |
| 625-2141 | Day Tank Pump Control Wiring, Rev. P | Pump |
| 509-0266-01 | Ring, O | Seal |
| 150-2201 | Sensor, Speed – Magnetic | Sensor |
| 517-0291 | Plug, Taper | Spark plug |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Cummins/Onan 4B 3.9-D(M) Configuration No. D381036MX02 powers 2 generator set(s), including Cummins/Onan 30MCGBA, Cummins/Onan 35MCGBA.