Service parts for the C1250 N6
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredBelts
1 requiredIgnition
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Gas |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 1250 kW |
| Standby kVA | 1250 |
| Prime power | 1250 kW |
| Emissions | 1.0 |
| Controller | PowerCommand 3.3 |
| Oil capacity | 560.0 L |
| Voltage options | 1247 V, 1380 V, 4160 V, 480 V, 600 V, 440 V, 380 V, 416 V |
| Phase | Three phase Line – Neutral/Line – Line |
| Power factor | 1.0 |
| Battery cranking | 450 CCA |
| Battery voltage | 24 V |
| Max ambient | 60 °C |
| Dimensions (L×W×H) | 2330×5000×2970 mm |
| Dry weight | 12877 kg |
Engine
| Oil capacity | 560.0 L |
|---|---|
| Coolant capacity | 424.0 L |
| Displacement | 91.0 L |
| Aspiration | Water cooled |
| Rated speed | 1200 rpm |
Maintenance & consumables
for the Cummins/Onan QSV91G| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Recommended air cleaner secondary element - (heavy duty) | — | 1000 hr | ||
| Fuel filter | Recommended fuel filter - secondary | — | 4000 hr | ||
| Fuel filter | Two-stage spin-on fuel filters and water separator system. Stage 1 has a three element, 7-micron filter and Stage 2 has a three element, 3-micron filter. | A055Y798 | Amazon eBay $5944.00 | ||
| Oil filter | Cummins OE filter | F60-1500 | 240 hr | Amazon eBay | |
| Battery | — | 480 hr | |||
| Belt | Cummins OE belt | B60-1500 | 3360 hr | Amazon eBay | |
| Coolant | CENTINEL™ Advanced Engine Oil Management System | — | 7304 hr | ||
| Coolant filter | not specified | — | 1000 hr | ||
| Oil | Cummins MCRS | 297.0 L | — | 1000 hr | |
| Spark plug | Cummins OE spark plug | S60-1500 | 240 hr | Amazon eBay |
Common questions
What size generator is the Cummins/Onan C1250 N6?
The Cummins/Onan C1250 N6 is rated 1250 kW standby (1250.0 kVA).
What engine does the Cummins/Onan C1250 N6 use?
The Cummins/Onan C1250 N6 is powered by the Cummins/Onan QSV91G engine.
What kind of fuel does the Cummins/Onan C1250 N6 run on?
The Cummins/Onan C1250 N6 runs on Gas.
How much oil does the Cummins/Onan C1250 N6 take?
The Cummins/Onan QSV91G engine in the Cummins/Onan C1250 N6 has an oil capacity of 560.0 liters.
How much coolant does the Cummins/Onan C1250 N6 hold?
The Cummins/Onan C1250 N6 cooling system holds 424 liters (112.0 US gallons) for the engine, per the manufacturer specification sheet.
What is the dry weight of the Cummins/Onan C1250 N6?
The Cummins/Onan C1250 N6 has a dry weight of 12877 kg (28388 lb).
What voltages is the Cummins/Onan C1250 N6 available in?
The Cummins/Onan C1250 N6 is offered in 1247 V, 1380 V, 4160 V, 480 V, 600 V, 440 V, Three phase Line – Neutral/Line – Line-phase.
How many cold cranking amps does the Cummins/Onan C1250 N6 require?
The Cummins/Onan C1250 N6 uses 24 V each, 450 CCA, per the manufacturer specification sheet.
Which oil filter part number does the Cummins/Onan C1250 N6 take?
The Cummins/Onan C1250 N6 uses oil filter part number F60-1500.
What fuel filter does the Cummins/Onan C1250 N6 use?
The Cummins/Onan C1250 N6 uses fuel filter part number A055Y798.
Parts
93| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 128-0108 | Insulation, Hose – Bulk (Order By The Foot – 12 Feet Required) | - | Hose | Amazon eBay |
| 130-3684 | Gasket | 6 | Gasket | Amazon eBay |
| 130-4546 | Bracket, Mounting – Coolant Heater | 2 | Fluid | Amazon eBay |
| 130-4552 | Cover, Coolant Heater | 2 | Fluid | Amazon eBay |
| 130-4885 | Radiator (Includes Jacketwater, Aftercooler, Cap, Overflow Hose and Sight Gauge Sevice Parts) 130–3588 | 1 | Hose | Amazon eBay |
| 130-5099 | Gasket | 8 | Gasket | Amazon eBay |
| 193-0486 | Sender, Low Coolant Level | 1 | Sensor | Amazon eBay |
| 309-0649 | Thermostat (Includes Connector Socket) (S11) | 1 | Thermostat | Amazon eBay $144.99 |
| 319-3950 | Gasket, Operator Panel | 1 | Gasket | Amazon eBay |
| 319-3951 | Gasket, Switch Panel | 1 | Gasket | Amazon eBay |
| 323-1445 | * Seal, Cable (Used With Station 17) | 2 | Seal | Amazon eBay |
| 323-1708 | # Seal, Cable (P8) | 4 | Seal | Amazon eBay |
| 330-0141-04 | Gasket, Cover | 1 | Gasket | Amazon eBay |
| 338-3335-01 | Harness, Wiring – AC – Coolant Heater (From Coolant Heater Bottom To Coolant Heater Control Box) (Includes Conduit Connectors) (30”) | 1 | Fluid | Amazon eBay |
| 338-3335-09 | Harness, Wiring – AC – Coolant Heater (From Coolant Heater Bottom To Coolant Heater Control Box) (Includes Conduit Connectors) (108”) | 1 | Fluid | Amazon eBay |
| 338-3831 | Harness, Wiring – DC – Engine Heater (From Coolant Heater Control Box To Engine And Main Engine Harness) (Includes Parts Marked *) | 1 | Fluid | Amazon eBay |
| 338-3832 | Harness, Wiring – Low Coolant Level Sender (4 Wire, 169”) (Includes Parts Marked *) | 1 | Sensor | Amazon eBay |
| 4321098765 | Fault Acknowledge Button | 1 | Fault acknowledge button | Amazon eBay |
| 502-0656 | Adapter, Male (1–5/16–12 Tubing to 1” Pipe) | 2 | Hose | Amazon eBay |
| 502-0827 | Fitting, Hose – Barbed (1/2” ID Pipe to 3/4” ID Hose) | 2 | Hose | Amazon eBay |
| 502-0836 | Fitting, Brass – Hose – Barbed (3/4” Pipe to 3/4” Hose) | 1 | Hose | Amazon eBay |
| 502-1257 | Connector, Hose – Barbed (Fits 3/4” ID Hose) | 2 | Hose | Amazon eBay |
| 503-0189 | Clamp, Hose | 1 | Hose | Amazon eBay |
| 503-0249 | Hose − Bulk (Order by the Foot − 3 Feet Required) | 1 | Hose | Amazon eBay |
| 503-1136 | Clamp, Hose | 16 | Hose | Amazon eBay |
| 503-1418 | Hose − Bulk (1/4” ID) (Order By The Foot − 18 Feet Required) | 1 | Hose | Amazon eBay |
| 503-1634-01 | Hose, Rubber (3/4” ID x 4”) | 4 | Hose | Amazon eBay |
| 503-1726 | Hose (5” ID x 6”) | 1 | Hose | Amazon eBay |
| 503-1727 | Hose, Radiator (3” ID x 10”) | 2 | Hose | Amazon eBay |
| 503-1728 | Hose (3” ID x 5–1/2”) | 1 | Hose | Amazon eBay |
| 503-1745 | Hose – Bulk – Front Grease Fitting (Order By The Foot – 2 Feet Required) | Hose | Amazon eBay | |
| 503-1863 | Hose, Radiator (1–1/2” ID x 4”) | 6 | Hose | Amazon eBay |
| 503-1872-05 | Clamp, Hose | 2 | Hose | Amazon eBay |
| 503-1872-09 | Clamp, Hose (5” ID) | 2 | Hose | Amazon eBay |
| 503-2129-05 | Line, Vent – Flexible – With One Male Pipe Swivel and One Female Pipe Swivel With O–Ring Face Seal (1/4” ID x 94–1/2”) Right Side | 1 | Seal | Amazon eBay |
| 505-1429 | Nipple, Pipe – Combination (1–1/2” Pipe to 1–1/2” Hose) | 2 | Hose | Amazon eBay |
| 509-0283-01 | Seal | 1 | Seal | Amazon eBay |
| 511-0161-17 | Belt, V Ribbed | 1 | Belt | Amazon eBay |
| 518-0548-24 | Clamp, Hose | 2 | Hose | Amazon eBay |
| 518-0548-25 | Clamp, Hose (3/8” ID) | 2 | Hose | Amazon eBay |
| A054B161 | Schematic Diagram | Schematic diagram | Amazon eBay | |
| AM47478880 | Temperature Sender, Exhaust Temperature Replaces 47367178, 87482353, LB52S00001P1 | Sensor | Amazon eBay | |
| AM47520140 | Sensor, 8-Pin/NH3/Ammonia Replaces 47368956, 84382712 | Sensor | Amazon eBay | |
| AM47520143 | Sensor, Def/AdBlue Quality Replaces 84553250 | Sensor | Amazon eBay | |
| AM504372225 | Sensor, MAP Temperature/Pressure Replaces 2852821, 4896794, 504073323 | Sensor | Amazon eBay | |
| FS1006 | Filter, Fuel Water Separator | 2 | Fuel filter | Amazon $33.95 eBay $29.99 |
| LF9050 | Lube, Combination | 4 | Oil filter | Amazon $75.15 eBay $49.99 |
| M-3331970 | Spacer Gasket for QSK45 and QSK60 Engine applications | Spacer gasket | Amazon eBay | |
| M-3649982 | Juntade culata de cilindro - sobredimensionada 0,020" - M-3649982 | Cylinder head盖板 | Amazon eBay | |
| M-4089203 | Juego Turbo e Interenfriador N. ° de Pieza | 1 | Turbocharger | Amazon eBay |
| M-4089233 | Juego Turbo e Interenfriador N. ° de Pieza | 1 | Turbocharger | Amazon eBay |
| MCBQSK0045 | Turbocharger Installation Kit | Gasket | Amazon eBay | |
| MCBQSK0048 | Water Pump Gasket Set | Gasket | Amazon eBay | |
| MCBQSK0058 | Water Pump Gasket Set | Gasket | Amazon eBay | |
| QSK60 | Gas engine | Engine | Amazon eBay FridayParts $8.65 SinoCMP $119.00 | |
| QSK60-G9 | Engine model for C2500 D5A generator sets | Engine | Amazon eBay $129895.00 | |
| QSK60G | Engine model QSK60G | Engine | Amazon $108.00 eBay FridayParts $20.59 | |
| QSV91G | Cummins QSV91G lean burn gas generator sets | 1 | Engine | Amazon eBay FridayParts $24.95 |
| 0130-5997-05 | Cummins Part No. 312/212, 37564; Cummins Part No. 312/212, 37604; Cummins Part No. 212, 37558; Cummins Part No. 212, 37614; Cummins Part No. 212, 37627; Cummins Part No. 313/312, 0179-2921; Cummins Part No. 313/312, 0179-2988; Cummins Part No. 312, 0179-3291; Cummins Part No. 312/212, 130-5791; Cummins Part No. 312/212, 37644; Cummins Part No. 312/212, 37624; Cummins Part No. 312/212, 37625; Cummins Part No. 212, 37648; Cummins Part No. 212, 37643; Cummins Part No. 212, 37678; Cummins Part No. 212, 37665; Cummins Part No. 312/212, 37676; Cummins Part No. 312/212, 37610; Cummins Part No. 313/212, 37642 | Service part / kit | Amazon eBay | |
| 0179-2862 | Nema 284T frame has the following arrangement: 6311 C3 / 18gram Polyrex – EM /20,000h | 6 | Service part / kit | Amazon eBay |
| 0179-3291 | Nema 284T frame has the following arrangement: 6311 C3 / 11gram Polyrex – EM /20,000h | 8 | Service part / kit | Amazon eBay |
| 130-5077-02 | Tube, Heater | 1 | Service part / kit | Amazon eBay |
| 130-5078-02 | Tube, Heater | 1 | Service part / kit | Amazon eBay |
| 130-5079-02 | Tube, Heater | 1 | Service part / kit | Amazon eBay |
| 130-5080-02 | Tube, Heater | 1 | Service part / kit | Amazon eBay |
| 130-5089-02 | Tube, Heater | 1 | Service part / kit | Amazon eBay |
| 323-1491 | * Pin, Contact (Used With Inline G) | 3 | Service part / kit | Amazon eBay |
| 323-1492 | * Socket, Contact (Used In Stations 18, 19) | 4 | Service part / kit | Amazon eBay |
| 323-1688 | * Socket, Contact (Used In P1) | 6 | Service part / kit | Amazon eBay |
| 323-1718 | * Pin, Contact (Used In Station 17) | 2 | Service part / kit | Amazon eBay |
| 4-2002 | PowerCommand Control | 1 | Service part / kit | Amazon eBay |
| 898-1254-25 | Sleeving – Heater Leads (59”) | 1 | Service part / kit | Amazon eBay |
| A056A610 | RECOMMENDED SPARES LIST (RSL) FOR DQKAD GENERATOR SETS | 1 | Service part / kit | Amazon eBay |
| A056A611 | RECOMMENDED SPARES LIST (RSL) FOR DQKAE GENERATOR SETS | 1 | Service part / kit | Amazon eBay |
| A056A612 | RECOMMENDED SPARES LIST (RSL) FOR DQKAF GENERATOR SETS | 1 | Service part / kit | Amazon eBay |
| A056F840 | Recommended Spares List (RSL) for DQKAN Generator Sets | Service part / kit | Amazon eBay | |
| F-1579 | Rev. 2/08 (2005) | Service part / kit | Amazon eBay | |
| M-3089173 | Bushing - Camshaft | Service part / kit | Amazon eBay | |
| M-4007741 | Bushing - Camshaft | Service part / kit | Amazon eBay | |
| M-4089083 | Single Cylinder Head | AR | Service part / kit | Amazon eBay |
| M-4089200 | Juego de Junta Modul. N. ° de Pieza | 4 | Service part / kit | Amazon eBay |
| M-4089201 | Juego Posenfriador Cuadrante N. ° de Pieza | 4 | Service part / kit | Amazon eBay |
| M-4089202 | Juego Sistema Enfriamiento N. ° de Pieza | 1 | Service part / kit | Amazon eBay |
| M-4089231 | Juego de Junta Modul. N. ° de Pieza | 4 | Service part / kit | Amazon eBay |
| M-4089232 | Juego Posenfriador Cuadrante N. ° de Pieza | 4 | Service part / kit | Amazon eBay |
| M-4089307 | Juego Bomba Inferior N. ° de Pieza | 1 | Service part / kit | Amazon eBay |
| M-4089308 | Juego Combustible Inferior N. ° de Pieza | 1 | Service part / kit | Amazon eBay |
| M-4089508 | Juego de Junta Modul. N. ° de Pieza | 4 | Service part / kit | Amazon eBay |
| M-4089509 | Juego Sistema Enfriamiento N. ° de Pieza | 1 | Service part / kit | Amazon eBay |
| M-4089874 | Juego Bloque Inferior N. ° de Pieza | 1 | Service part / kit | Amazon eBay |
| M-4955369 | Juego Posenfriador Cuadrante N. ° de Pieza | 4 | Service part / kit | Amazon eBay |
| M-4955370 | Juego de Junta Modul. N. ° de Pieza | 4 | Service part / kit | Amazon eBay |
| M-4956000 | Culata Cilindro Simple N. ° de Pieza AR | 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
Spec sheet — C1250N6 - D-6454 (Cummins/Onan)Spec sheet — F-1414-LeanBurnGensets-en (Cummins/Onan)Spec sheet — s-1623 (Cummins/Onan)Reference — 0056242 (Cummins/Onan)Service manual — C1250N6-Generator-Set-with-PowerCommand-3300-Control-Installation-Manual-A029R140-I9-5-2020 (Cummins/Onan)
This page was generated from the 5 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.