Specifications
| Fuel | Gasoline |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 0 kW |
| Oil capacity | 1.65 L |
| Voltage options | 120 V, 240 V, 24 V, 32 V |
| Phase | 1 |
| Fuel tank | 7.57 L |
Maintenance & consumables
for the Cummins/Onan AK| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil | Service MS or MS/DG | — | 50 hr |
Common questions
What is the power rating of the Cummins/Onan 07AK?
The Cummins/Onan 07AK is rated 0 kW standby.
What engine does the Cummins/Onan 07AK use?
The Cummins/Onan 07AK is powered by the Cummins/Onan AK engine.
What fuel does the Cummins/Onan 07AK use?
The Cummins/Onan 07AK runs on Gasoline.
What is the oil capacity of the Cummins/Onan 07AK?
The Cummins/Onan AK engine in the Cummins/Onan 07AK has an oil capacity of 1.65 liters.
Troubleshooting
22Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| BLACK, SMOKY EXHAUST | EXCESSIVE FUEL CONSUMPTION, FOULING OF SPARK PLUG WITH Soot, POSSIBLE LACK OF POWER UNDER HEAVY LOAD | Fuel mixture too rich. Choke not open. Dirty air cleaner. Excessive crankcase pressure, causing excessive fuel pump pressure. Adjust carburetor or choke. Install needed parts, Inspect linkage and setting. |
| ENGINE STOPS UNEXPECTEDLY | Fuel tank empty. Defective ignition. | Fill with fresh fuel. Check ignition system. |
| SHARP METALLIC THUD, ESPECIALLY WHEN COLD ENGINE FIRST STARTED | Low oil supply. Oil badly diluted. | Add oil. Change oil. |
| PINGING SOUND WHEN ENGINE IS SUDDENLY OR HEAVILY LOADED | Wrong spark plug. Spark plug burned out/carboned. Fuel stale or low octane. Lean fuel mixture. | Install correct spark plug. Install new plug. Use good, fresh fuel. Clean & adjust carburetor. |
| LIGHT POUNDING KNOCK | Low oil supply. Oil badly diluted. | Add oil. Change oil. |
| ENGINE MISFIRES AT LIGHT LOAD | Spark plug gap too narrow. Intake air leak. Faulty ignition. Low compression. | Adjust to correct gap. Tighten or replace manifold and carburetor gaskets. Clean, adjust or replace spark plugs. Tighten cylinder head and spark plug. |
| ENGINE MISFIRES AT HEAVY LOAD | Spark plug gap too wide. | Adjust gap. |
| Engine backfires | Lean fuel mixture. Poor fuel. | Clean or adjust carburetor. Refill with good, fresh fuel: |
| ENGINE RACES | Governor not controlling carburetor. performance & linkage condition. | Check governor performance & linkage condition. |
| ENGINE OVERHEATING | Poor air circulation. Improper lubrication. Fuel mixture too lean. | Clean cooling fins. See Low Oil Pressure. Adjust carburetor. |
| VOLTAGE LOW AT FAR END OF LINE BUT NORMAL NEAR POWER PLANT | Too small line wire for load and distance. | Install larger or extra wires or reduce load. |
| ELECTRIC MOTOR RUNS TOO SLOWLY AND OVERHEATS AT FAR END OF LINE BUT OK IF USED NEAR POWER UNIT | Too small line wire for load and distance. | Install larger or extra wires or reduce load. |
| VOLTAGE UNSTEADY BUT ENGINE NOT MISFIRING | Speed too low. Loose connections. Fluctuating load. | Adjust governor to correct speed. Tighten connections. Correct any abnormal load condition causing trouble. |
| GENERATOR OVERHEATING (Approximately 160°F higher than ambient) | Overloaded. | Reduce load. |
| VOLTAGE DROPS UNDER HEAVY LOAD | Engine lacks power. Poor compression. Faulty carburetion. | See remedies for engine misfires under heavy load. Tighten cylinder head & spark plugs. Clean the fuel system. |
| Dirty air cleaner. | Clean. | |
| Restricted exhaust line. | Clean or increase the size. | |
| Choke partially closed. | See that it opens fully. | |
| Engine will not crank | Battery discharged. Loose connections, Defective starting circuit. Defective switch. | Recharge. Tighten connections. Repair or replace as necessary. Replace. |
| Engine cranks too stiffly | Too heavy oil in crankcase. | Drain, refill with lighter oil. |
| Engine will not start when cranked | Lack of fuel or faulty catburetion. Clogged fuel screen. Cylinders flooded. Poor fuel. | Refill tank. Check fuel system. Clean, adjust, as necessary. Clean. Crank few times with spark plug removed. Drain, fill with fresh fuel. |
| Excessive oil consumption, light blue smoky exhaust | Oil leaks from unl base ot connections. Oil too light or diluted. Engine misfiting. Faulty ignition. Too much | Replace gaskets. Tighten screws and connection. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
58| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 101K257 | Gasket Kit, Brg. Plt. to Eng. | 1 | Gasket | PartsGeek |
| 102B18 | Gasket, Oil Base or Pan | 1 | Gasket | PartsGeek |
| 103B13 | Gasket, Gear Cover | 1 | Gasket | PartsGeek |
| 110A65 | Gasket, Intake Val. Guide | 1 | Gasket | PartsGeek |
| 110A832 | Gasket, Valve Cover | 1 | Gasket | PartsGeek |
| 110C836 | Gasket, Cyl. Hd. | 1 | Gasket | PartsGeek |
| 120A200 | Pump, Oil | 1 | Pump | PartsGeek |
| 120A394 | Pump, Oil | 1 | Pump | PartsGeek |
| 120K161 | Gasket Kit, Oil Pump | 1 | Gasket | PartsGeek |
| 140A369 | Cleaner, Air - Dry Type, Complete | 1 | Air filter | PartsGeek |
| 140A443 | Gasket, Oil Bath to Adapter | 1 | Gasket | PartsGeek |
| 140B441 | Cleaner, Air - Oil Bath Type | 1 | Air filter | PartsGeek |
| 143-36 | Gasket, Bowl Screw | 1 | Gasket | PartsGeek |
| 143-77 | Gasket, Bowl Ring | 1 | Gasket | PartsGeek |
| 143A15 | Gasket, Fuel Inlet Valve | 1 | Gasket | PartsGeek |
| 143K80 | Gasket Kit, Carburetor | 1 | Gasket | PartsGeek |
| 145A110 | Gasket, Spacing, Carb. Flange | 1 | Gasket | PartsGeek |
| 145A111 | Gasket, Air Cleaner Adapter to Carb. | 1 | Gasket | PartsGeek |
| 149A149 | Gasket | 1 | Gasket | PartsGeek |
| 149A3 | Gasket, Pump Mounting | 1 | Gasket | PartsGeek |
| 149A561 | Line, Fuel | 1 | Hose | PartsGeek |
| 149A672 | Gasket, Valve | 1 | Gasket | PartsGeek |
| 149A858 | Gasket, Diaphragm - Lower Side | 1 | Gasket | PartsGeek |
| 149B79 | Filter | 1 | Fuel filter | PartsGeek |
| 149C588 | Line, Fuel | 1 | Hose | PartsGeek |
| 149C693 | Pump | 1 | Pump | PartsGeek |
| 159A727 | Line, Fuel | 1 | Hose | PartsGeek |
| 159A728 | Line, Fuel | 1 | Hose | PartsGeek |
| 159B504 | Line, Fuel | 1 | Hose | PartsGeek |
| 159B538 | Line, Fuel | 1 | Hose | PartsGeek |
| 159B564 | Line, Fuel | 1 | Hose | PartsGeek |
| 159B588 | Line, Fuel | 1 | Hose | PartsGeek |
| 159B637 | Line, Fuel | 1 | Hose | PartsGeek |
| 159C633 | Line, Fuel | 1 | Hose | PartsGeek |
| 160A461 | Gasket, Plunger Guide | 1 | Gasket | PartsGeek |
| 167-28 | Plug, Spark | 1 | Spark plug | PartsGeek |
| 168K62 | Gasket Kit, Plant | 1 | Gasket | PartsGeek |
| 333A12 | Thermostat | 1 | Thermostat | PartsGeek |
| 501A25 | Hose, Reg.-to-Carb. | 1 | Hose | PartsGeek |
| 501A27 | Line, Flexible, Tank to Filter, 48" | 1 | Hose | PartsGeek |
| 503A271 | Hose, Breather, 7/16" x 54" | 1 | Hose | PartsGeek |
| 503A315 | Hose, Reg.-to-Carb. | 1 | Hose | PartsGeek |
| 509-12 | Seal, Crankshaft Oil, Front | 1 | Seal | PartsGeek |
| 509-65 | Seal, "O" Ring | 1 | Seal | PartsGeek |
| 509-8 | Seal, Oil - Gov. Shaft | 1 | Seal | PartsGeek |
| 509A11 | Seal, Oil - Crankshaft Rear | 1 | Seal | PartsGeek |
| 815-148 | Pump, Fuel | 1 | Pump | PartsGeek |
| 143K81 | Parts Kit, Carb. | 1 | Service part / kit | PartsGeek |
| 148-300 | Repair Kit, Gas Regulator | 1 | Service part / kit | PartsGeek |
| 148-522 | Repair Kit, Gas Regulator | 1 | Service part / kit | PartsGeek |
| 148A428 | Regulator, Gas Pressure | 1 | Service part / kit | PartsGeek |
| 148C311 | Regulator, Gas Pressure | 1 | Service part / kit | PartsGeek |
| 148P390 | Repair Kit, Gas Regulator | 1 | Service part / kit | PartsGeek |
| 149A539 | Diaphragm Assembly | 1 | Service part / kit | PartsGeek |
| 160K540 | Point Set | 1 | Service part / kit | PartsGeek |
| 312A33 | Condenser | 1 | Service part / kit | PartsGeek |
| 522K213 | Overhaul Kit - Std. | 1 | Service part / kit | PartsGeek |
| 815-147 | Repair Parts Kit | 1 | Service part / kit | PartsGeek |
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.