Specifications
| Fuel | Natural Gas |
|---|---|
| Frequency | 60.0 Hz |
| Emissions | EPA |
| Oil capacity | 20.8 L |
Engine
| Oil capacity | 20.8 L |
|---|---|
| Displacement | 8.9 L |
| Aspiration | Turbocharged and aftercooled |
| Rated speed | 1800 rpm |
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 250 hr | |||
| Fuel filter | Check fuel lines and hoses: Visually check for leaks, worn or damaged hoses. To replace, contact your authorized distributor. | — | 24 hr | ||
| Oil filter | Replace engine oil and filters. Refer to the Engine Oil section for the procedure. | — | 250 hr | ||
| Battery | Check battery for general condition. Remove any corrosion on terminals with wire brush. | — | 50 hr | ||
| Belt | Checking drive belt condition and tension: Visually check belt for evidence of wear or slippage. To replace, contact your authorized distributor. | — | 24 hr | ||
| Coolant | Starts to open within 2 °F (1 °C) of 180 °F (82 °C); Fully open within 2 °F (1 °C) of 203 °F (95 °C); Flow valve and flange clearance (minimum): 0.26 in (6.6 mm) | — | 500 hr | ||
| Oil | Replace engine oil and filters. Refer to the Engine Oil section for the procedure. | — | 250 hr | ||
| Spark plug | 38 Nm (28 lb-ft) | — | 500 hr |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Common questions
What engine is in the Cummins/Onan C125 N6?
The Cummins/Onan C125 N6 is powered by the Cummins/Onan QSJ8.9G engine.
What kind of fuel does the Cummins/Onan C125 N6 run on?
The Cummins/Onan C125 N6 runs on Natural Gas.
What is the oil capacity of the Cummins/Onan C125 N6?
The Cummins/Onan QSJ8.9G engine in the Cummins/Onan C125 N6 has an oil capacity of 20.8 liters.
Parts
9| Part # | Description | Qty | System | |
|---|---|---|---|---|
| GM28980 | UEGO Oxygen Sensor | Sensor | Amazon eBay | |
| GM17010-KP4 | LP gas mixer and fuel regulator kit | Service part / kit | Amazon eBay | |
| L447/9T | N/A | - | Service part / kit | buy |
| LG230 | Home Maintenance Kit | Service part / kit | Amazon eBay | |
| SBBADMR125D | Bell Alarm and Alarm Relay Combination Module for 125V AC (Drawout Application) | Service part / kit | Amazon eBay | |
| SBDMR125 | Alarm Relay for 125V AC (Drawout Application) | Service part / kit | Amazon eBay | |
| SBEO125LEC | Electric Operator with Local Electric Close and CCX Option | Service part / kit | Amazon eBay | |
| SBEO125LECCCX | Electric Operator with Local Electric Close and CCX Option | Service part / kit | Amazon eBay | |
| SBRCS125LEC | Remote Closing Solenoid for 125V AC | 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
Spec sheet — 0075811 (Cummins/Onan)Spec sheet — eds-3031 (Cummins/Onan)Operator's manual — 46c22273-0932-41fa-be88-a46209ba2f93 RS125RS150OwnerManualA061F627C2019 (Cummins/Onan)Service manual — C80N6 Service Manual (Cummins/Onan)
This page was generated from the 4 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.