Specifications
| Fuel | Gasoline |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 7 kW |
| Prime power | 6 kW |
| Oil capacity | 6.15 L |
| Voltage options | 120 V, 240 V |
| Phase | 1 |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 11.4 L |
Engine
| Oil capacity | 6.15 L |
|---|---|
| Coolant capacity | 11.4 L |
| Aspiration | Naturally Aspirated |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan J Series| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Polyurethane foam air cleaner element | — | 200 hr | find | |
| Fuel filter | Fuel filter with sediment bowl | — | 100 hr | find | |
| Oil filter | Spin-on oil filter | — | 500 hr | find | |
| Belt | Drive belts and fan belt, deflection 0.5 in at 15 lbs force | — | 500 hr | find | |
| Coolant | Rust inhibitor and water or 50/50 antifreeze mix | 11.4 L | — | 500 hr | |
| Coolant filter | — | find | |||
| Oil | API SF/CD, 20W-40 or 20W-50 at 60-100F | 6.15 L | — | 500 hr |
Common questions
What is the power rating of the Cummins/Onan RJ?
The Cummins/Onan RJ is rated 7 kW standby.
What engine does the Cummins/Onan RJ use?
The Cummins/Onan RJ is powered by the Cummins/Onan J Series engine.
What fuel does the Cummins/Onan RJ use?
The Cummins/Onan RJ runs on Gasoline.
What is the oil capacity of the Cummins/Onan RJ?
The Cummins/Onan J Series engine in the Cummins/Onan RJ has an oil capacity of 6.15 liters.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Dizziness | If you experience any of these symptoms, get out into fresh air immediately, shutdown the unit and do not use until it has been inspected. | |
| External coolant leakage may occur at any joint in the engine water jacket, such as drain plugs, core hole plugs, or cylinder head joint. | Since expansion or contraction can aggravate leakage, the block should be inspected both hot and cold while engine is running. | |
| Internal leakage occurs when coolant passes into engine oil through a loose cylinder head joint or a cracked or porous casting. | The leakage is not visible but may cause extensive damage to engine. Coolant mixes with the oil to form sludge, which causes lubrication failure. Heavy sludge accumulations followed by sticking piston rings, valves, and tappets are symptoms of internal leakage. | |
| Thermostat does not start to open when suspended in water at 150°F or does not close within a short time after being removed from hot water. | Replace thermostat if it is broken, corroded, or sticks in open or closed position. If engine overheats or does not reach and maintain a minimum operating temperature, thermostat should be removed and tested as a possible cause. | |
| Draining cooling system to change anti-freeze solution or for out-of-service protection when only water is used, be sure to open all drains and hose connections where water could be trapped. | The following drain plugs must be opened or removed to allow complete flushing of the cooling system. Radiator: One petcock lower right front corner. Engine Block One drain plug left front near water pump. Water Pumps: One drain plug under cover or by loosening cover. | |
| Pressure cap malfunctions. | Inspect pressure cap periodically for freedom of operation, and gasket should be checked for proper sealing. Replace pressure cap if it malfunctions. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
10| Part # | Description | Qty | System | |
|---|---|---|---|---|
| A742 | ALGAS SOLENOID PRIMER | Primer | eBay $33.99 | |
| X9079912 | Gas Regulator (Garretson) | Regulator | buy | |
| 10AT73 | T A B L E O F | Service part / kit | buy | |
| 55432 | IMPORTANT...RETURN WARRANTY CARD ATTACHED TO UNIT | Service part / kit | buy | |
| A076 | SOLENOID COIL | 1 | Service part / kit | buy |
| g00640926 | Never spray Ether starting aids into the air inlet. | Service part / kit | buy | |
| i02143194 | Support the component correctly when work beneath the component is performed. | Service part / kit | buy | |
| i02143195 | Obey all local regulations for the disposal of liquids. | Service part / kit | buy | |
| i02203039 | Attach a 'Do Not Operate' warning tag or a similar warning tag to the start switch or to the controls before you service the equipment or before you repair the equipment. | Service part / kit | buy | |
| i02206606 | Safety Messages | Service part / kit | buy |
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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | |||
| Standby |
Available documents
Operator's manualParts manualService manual