Service parts for the 20.OES
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
| Starting system | 12 V DC |
|---|
Maintenance & consumables
for the Ford LSG-4231-6005-A| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Element, Air Cleaner | 140-0765 | Amazon eBay $12.13 | ||
| Fuel filter | Filter, Fuel | 149-1774 | eBay $34.99 KuduParts $7.00 | ||
| Oil filter | Filter, Oil | 122-0193 | Amazon eBay $18.32 NAPA $10.64 | ||
| Belt | Belt, Drive | 511-0112 | Amazon eBay |
Common questions
What engine does the Cummins/Onan 20.OES use?
The Cummins/Onan 20.OES is powered by the Ford LSG-4231-6005-A engine.
Which oil filter part number does the Cummins/Onan 20.OES take?
The Cummins/Onan 20.OES uses oil filter part number 122-0193.
What fuel filter fits the Cummins/Onan 20.OES?
The Cummins/Onan 20.OES uses fuel filter part number 149-1774.
Which air filter part number does the Cummins/Onan 20.OES take?
The Cummins/Onan 20.OES uses air filter part number 140-0765.
Parts
74| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 102-1461 | Gasket, Oil Drain | 1 | Gasket | eBay |
| 122-0193 | Filter, Oil - Heavy Duty (5-3/4") | 1 | Oil filter | Amazon eBay $18.32 NAPA $10.64 |
| 140-0765 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $12.13 |
| 140-1089 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $161.22 |
| 141-0959 | Gasket, Mounting - Carburetor | 1 | Gasket | eBay |
| 141-0971 | Gasket, Carburetor | 1 | Gasket | eBay |
| 148-0367-01 | Switch, Vacuum (S13) | 1 | Sensor | eBay |
| 148-0627 | Switch, Pressure 12 VDC (S9) | 1 | Sensor | eBay |
| 149-1774 | Filter, Fuel | 1 | Fuel filter | eBay $34.99 KuduParts $7.00 |
| 149-1776 | Line, Fuel - Pump to Filter | 1 | Hose | eBay |
| 149-1810 | Pump, Fuel | 1 | Pump | eBay |
| 149-1869 | Line, Fuel - Solenoid to Carburetor | 1 | Hose | eBay |
| 149-2331 | Pump, Fuel | 1 | Pump | eBay $17.02 |
| 149-2507 | Line, Upper - Fuel | 1 | Hose | eBay |
| 150-1406 | Sensor, Speed - Magnetic | 1 | Sensor | Amazon eBay |
| 150-2651 | Pickup, Magnetic | 1 | Sensor | eBay |
| 193-0244 | Sender, Oil Pressure (E1) | 1 | Sensor | Amazon eBay |
| 193-0318 | Sender, Water Temperature | 1 | Sensor | Amazon eBay $73.95 |
| 193-0329 | Radiator | 1 | Sensor | eBay |
| 193-0448 | Sender, Oil Pressure | 1 | Sensor | Amazon eBay |
| 300-1540 | AVR-A VOLTAGE REGULATOR | 1 | Avr | Amazon eBay $2250.00 |
| 300-1654 | Board, Voltage Regulator | 1 | Avr | eBay |
| 305-0688 | AVR-B VOLTAGE REGULATOR | 1 | Avr | Amazon eBay $1250.00 |
| 309-0128 | Thermostat - Adjustable | 1 | Thermostat | Amazon eBay |
| 309-0179 | Switch, High Water Temperature (Standard Part) Side Mounted On Water Outlet Housing | 1 | Sensor | Amazon eBay |
| 309-0269 | Sender, Temperature-Lo Engine | 1 | Sensor | Amazon eBay $239.00 |
| 309-0641-03 | Switch, Oil Pressure (Closes at 14 lbs. Descending) (S1) | 1 | Sensor | Amazon eBay |
| 309-0641-07 | Switch, Oil Pressure (Closes at 20 lbs. Descending) | 1 | Sensor | Amazon eBay |
| 309-0641-17 | Switch, Pressure - Oil (Shutdown) (S6) | 1 | Sensor | eBay |
| 309-0641-18 | PRESSURE SWITCH | 1 | Sensor | Amazon eBay |
| 502-0004 | Gasket, Mounting - Fuel Pump (Supplied by Ford) | 2 | Gasket | eBay |
| 503-0261 | Hose (8.5") | 1 | Hose | Amazon eBay |
| 503-0276 | Hose, Breather | -1 | Hose | eBay |
| 503-0492 | Hose, Overflow | 1 | Hose | Amazon eBay |
| 503-0542 | Hose, Rubber | 1 | Hose | Amazon eBay |
| 503-0833 | Hose, Engine Coolant | 1 | Hose | Amazon eBay |
| 503-0869 | Hose, Radiator - Lower | 1 | Hose | Amazon eBay |
| 503-0883 | Hose, Rubber | 2 | Hose | eBay |
| 503-1058 | Spacer, Fan Hose, Radiator - Upper | 1 | Hose | Amazon eBay |
| 503-1137 | Clamp, Hose | 1 | Clamp | Amazon eBay $9.95 |
| 503-1684 | Hose, Radiator - Upper | 1 | Hose | eBay |
| 503-1908 | Hose, Air Cleaner | 1 | Hose | eBay |
| 511-0112 | Belt, Fan | 1 | Belt | Amazon eBay |
| 520-0799 | Seal, O-Ring | 1 | Seal | eBay |
| 130-0661 | Cap, Heat Exchanger - 7PSI | 1 | Service part / kit | eBay |
| 130-1341 | Zinc Pencil | 1 | Service part / kit | Amazon eBay |
| 130-1788 | Cap, Radiator | 1 | Service part / kit | Amazon eBay |
| 141-0915 | Carburetor, Vapor-Gas | 1 | Service part / kit | eBay |
| 141-0944 | Kit, Repair - Carburetor Solenoid | 1 | Service part / kit | eBay |
| 141-0953 | Carburetor, Gasoline | 1 | Service part / kit | eBay |
| 141-0954 | Carburetor | 1 | Service part / kit | eBay |
| 148-0597 | Regulator, Natural Gas | 1 | Service part / kit | Amazon eBay |
| 148-0637 | Regulator, LPG Vapor | 1 | Service part / kit | Amazon eBay |
| 148-0691 | Mixer, Vapor - Gas (1/2 NPT) | 1 | Service part / kit | eBay |
| 148-0737 | Regulator/Converter - LPG | 1 | Service part / kit | Amazon eBay |
| 150-0723 | +Contact | 1 | Service part / kit | Amazon eBay |
| 150-1446 | Bracket and Point Assembly [Includes Parts Marked #) | 1 | Service part / kit | eBay |
| 191-1390 | Regulator, Voltage (Includes Parts Marked #) | 1 | Service part / kit | Amazon eBay |
| 304-0120 | Resistor, Fixed (2 Ohm, 25 Watt) | 2 | Service part / kit | Amazon eBay |
| 307-0268 | Valve, Solenoid | 1 | Service part / kit | Amazon eBay |
| 307-0312 | Valve, Fuel | 1 | Service part / kit | Amazon eBay |
| 307-0833 | Valve, Solenoid - 12 VDC (1/2 NPT) | 1 | Service part / kit | Amazon eBay |
| 307-1279 | Valve, Fuel Solenoid | 1 | Service part / kit | Amazon eBay |
| 309-0437 | (222"F) | 1 | Service part / kit | Amazon eBay |
| 309-0598 | Valve, Saver - Water - Heat Exchanger | 1 | Service part / kit | eBay |
| 312-0197 | Capacitor | 1 | Service part / kit | eBay |
| 333-0151 | Heater, Electrical - 75 Watt, 120 VAC; 300 Watt, 240 VAC | 1 | Service part / kit | Amazon eBay |
| 333-0203 | Heater, Tank - 850 Watt, 115 Volt | 1 | Service part / kit | eBay |
| 333-0588-01 | Heater, Engine Coolant | 1 | Service part / kit | Amazon eBay |
| 357-0030 | Rectifier | 1 | Service part / kit | Amazon eBay $38.99 |
| 358-0069 | Rectifier (Positive) | 1 | Service part / kit | Amazon eBay |
| 358-0070 | Rectifier (Negative) | 1 | Service part / kit | Amazon eBay |
| 504-0003 | Cock, Drain (1/4 NPT) | 1 | Service part / kit | Amazon eBay |
| 510-0112 | Bearing, Ball | 1 | Service part / kit | 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.
Available documents
Parts manual — 928-0222 Onan ES (spec A-G) Genset Parts manual (01-1998) (Cummins/Onan)
This page was generated from the 1 manufacturer document above by automated extraction; every figure shown is copied from one of them. How the data is compiled.