Service parts for the 2000 watt DC
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Voltage options | 115 V, 230 V |
|---|---|
| Phase | DC |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Filter | 1234-001 | Amazon eBay | ||
| Fuel filter | Fuel Filter | 1234-003 | Amazon eBay | ||
| Oil filter | Oil Filter | 1234-002 | Amazon eBay | ||
| Belt | Belt | 1234-004 | Amazon eBay |
Common questions
What oil filter does the Cummins/Onan 2000 watt DC use?
The Cummins/Onan 2000 watt DC uses oil filter part number 1234-002.
What fuel filter fits the Cummins/Onan 2000 watt DC?
The Cummins/Onan 2000 watt DC uses fuel filter part number 1234-003.
What air filter fits the Cummins/Onan 2000 watt DC?
The Cummins/Onan 2000 watt DC uses air filter part number 1234-001.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| ENGINE CRANKS TOO STIFFLY | Too heavy oil in crankcase, Drain. Refill-with lighter oil. See PREPARATION. | Drain. Refill-with lighter oil. Disassemble and repair. |
| ENGINE CRANKS. TOO SLOWLY WHEN CRANKED ELECTRICALLY | Discharged or defective battery, Loose connections, Corroded battery terminals. | Recharge or replace. Tighten loose connections. Clean corroded terminals. Replace cable if necessary. |
| ENGINE WILL NOT START WHEN CRANKED | Faulty ignition, Lack of fuel or faulty carburetion, Clogged fuel filter, Cylinders flooded, Poor fuel. | Clean, adjust, or replace breaker points, spark plugs, condenser, etc., or retime ignition. Refill the tank. Check the fuel system. Clean. |
| ENGINE RUNS BUT VOLTAGE DOES NOT BUILD UP | Poor brush contact, Open circuit, short circuit, or ground in generator. | See that brushes seat well on commutator and collector rings, are free in holders, are not worn shorter than 5/8 inch, and have good spring tension. Refer to the GENERATOR section-of MAINTENANCE and REPAIR. |
| VOLTAGE UNSTEADY BUT ENGINE NOT MISFIRING | Speed too low, Poor commutation or brush contact. | Adjust governor to correct speed. Refinish commutator or undercut mica if necessary. See that brushes seat well on commutator and collector rings; are free in holders, are not worn shorter than 5/8 inch, and have good spring tension. |
| ENGINE OVERHEATING | Short in load circuit, Generator overloaded, Improper brush rig position. | Correct short circuit. Reduce the load. See BRUSHES, MAINTENANCE and REPAIR. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan 2000 watt DC troubleshooting guide (26 entries) →
Parts
6| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 1234-001 | Air Filter | 1 | Air filter | Amazon eBay |
| 1234-002 | Oil Filter | 1 | Oil filter | Amazon eBay |
| 1234-003 | Fuel Filter | 1 | Fuel filter | Amazon eBay |
| 1234-004 | Belt | 1 | Belt | Amazon eBay |
| 1234-005 | Battery | 1 | Battery | Amazon eBay |
| 1234-006 | Spark Plug | 1 | Spark plug | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.