Specifications
| Fuel | regular-grade gasoline |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 3 kW |
| Standby kVA | 3 |
| Oil capacity | 0.9 L |
| Voltage options | 420 V, 240 V |
| Phase | three-phase |
| Rated current | 25 A |
| Power factor | 100 |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Fuel tank | 8.5 L |
Engine
| Oil capacity | 0.92 L |
|---|---|
| Displacement | 0.276 L |
| Aspiration | naturally_aspirated |
| Rated speed | 3600 rpm |
Maintenance & consumables
for the Cummins/Onan GS280-DG-A3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Foam wrapper + cartridge element; clean/re-oil foam each service, replace cartridge every 6 cleanings or yearly. | — | 25 hr | ||
| Fuel filter | Fuel filter/cock cleaning per periodic maintenance chart; no cartridge part number given. | — | |||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | API SE/SF class engine oil; 10W-30 below -10C, SAE#20 below 15C, SAE#30 above 15C. First change at 10 hrs, then every 50 hrs. | — | 50 hr | ||
| Spark plug | Gap 0.6-0.7mm (GS130/GS280 engines), 0.7mm (K1400/K3000), 1.0mm (K2100/GN1850), 0.7mm (K1800), varies by model. | — | 50 hr |
Common questions
How many kW is the Cummins/Onan K3500?
The Cummins/Onan K3500 is rated 3 kW standby (3.0 kVA).
What engine is in the Cummins/Onan K3500?
The Cummins/Onan K3500 is powered by the Cummins/Onan GS280-DG-A3 engine.
What fuel type does the Cummins/Onan K3500 take?
The Cummins/Onan K3500 runs on regular-grade gasoline.
How much oil does the Cummins/Onan K3500 take?
The Cummins/Onan GS280-DG-A3 engine in the Cummins/Onan K3500 has an oil capacity of 0.92 liters.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Crankcase pressure might blow out hot oil and cause serious burns. | Do not attempt to check oil while the generator set is running. Add oil until it reaches the top of the oil port. | |
| Fuel level indicator looks damaged or loose. | Install a new indicator before starting generator set. | |
| Generator set operates on a slight grade, and the fuel tank is completely filled. | Do not fill completely if the generator set will operate on a slight grade. | |
| Faulty electrical equipment connected to the generator presents an electrical shock hazard. | Check all electrical equipment for frayed cords or breaks in the insulation before using. Properly applied and maintained ground fault circuit interrupters can afford additional protection against the hazard of electrical shock. | |
| Pilot lamp does not light and output voltage is OV | Faulty contact of receptacles or disconnected wiring inside of control box | Repair or replace |
| Output voltage is not delivered | Disconnected wiring | Repair or replace stator coil, demagnetization of permanent magnet, clean brush contact and slip ring, repair or replace brush, or repair or replace sub coil |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan K3500 troubleshooting guide (12 entries) →
Repair guides
10- | Trouble Checking method asurement / Possible cause Countermeasures
- @ Disconnected wiring (rear Check wiring. Repair.
- Tester is in R x 1 range.
- $s _ does not | ' wiring). Replace cir- |
- 4.1 Disassembly and reassembly of generator parts
- | Trouble Checking method asurement / Possible cause Countermeasures: *Check for short to ground condition. Test meter set on
- *Check for short to ground condition. Test meter set on
- Tester is in R x 1 range.: Tester probe (+) | Tester probe (—) tester
- Tester probe (+) | Tester probe (—) tester
- Trouble Checking method easu e u Possible cause Countermeasures: *Check for short to ground condition. Test meter set on
Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
4| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 981-0123 | Recoil Starter Control Panel | 1 | Recoil starter | Amazon eBay |
| M-1534 | Air Cleaner | 1 | Air cleaner | Amazon eBay |
| K2100 | STARTING | Service part / kit | Amazon eBay FridayParts $44.52 | |
| K3500 | STARTING | Service part / kit | Amazon eBay FridayParts $13.88 |
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.