Cummins/Onan QSL 9 Engine
The Cummins/Onan QSL 9 is a 8.9 L 6-cylinder turbocharged and charge-air cooled engine rated at 1470 rpm, producing up to 299 kW. It powers generator sets from Cummins/Onan, including the CFP9E-F40, CFP9E-F50, CFP9EVS-F40 and CFP9EVS-F50. It holds 24 L (6.3 gal) of oil and 2.9 L (0.8 gal) of coolant.
Also known as: Cummins QSL 9
Part of the Cummins/Onan QSL9 engine family — 17 variants share parts & fitment.
Engine specifications
| Oil capacity | 24.0 L |
|---|
| Coolant capacity | 2.9 L |
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| Displacement | 8.9 L |
|---|
| Cylinders | 6 |
|---|
| Aspiration | Turbocharged and Charge-Air Cooled |
|---|
| Rated speed | 1470 rpm |
|---|
| Gross power | 299 kW |
|---|
Maintenance schedule
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
Service intervals
11| Item | Action | Hours | Months | Notes |
|---|
| air filter (primary) | Change | 2000 hr | | KIT–500 HOURS 22354385 |
| coolant filter (engine) | Change | 2000 hr | | KIT–500 HOURS 22354385 |
| fuel filter (primary) | Change | 2000 hr | | First service — KIT–500 HOURS 22354385 |
| oil filter (airend) | Change | 2000 hr | | First service — KIT–500 HOURS 22354385 |
| oil filter (engine) | Change | 2000 hr | | First service — KIT–500 HOURS 22354385 |
| filters | Change | 1000 hr | | with CENTINEL, depending on load factors |
| ELIMINATOR self cleaning filter core | Other | 1500 hr | | Requires servicing only every 1,500 hours. Saves up to 90% of lube system maintenance costs and increases productivity. |
| fuel filter | Change | 1500 hr | | Fleetguard NanoNet media |
| air filter (safety) | Change | 2000 hr | | KIT–2000 HOURS 22354369 (SHP, XHP) |
| separator element | Change | 2000 hr | | KIT–2000 HOURS 22354369, element 89202022 (SHP, XHP) |
| engine oil | Change | 4500 hr | | with CENTINEL, railway applications |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
11| Type | Item | Value | Unit | Condition |
|---|
| Other | DB9F-DB9M serial cable length (Part Number 4918418) | 1.83 | M | |
| Other | Extension DB9F to DB9M length (Part Number 3162851) | 30.48 | M | |
| Other | INLINE™5 datalink adapter current requirement | 250 | mA | at +8 VDC to +50 VDC |
| Other | Pressure sensing line nominal size inside diameter | 1/2 | in. (12.7 mm) | connected between the transducer (located under the FPDP) and the pump discharge flange and the discharge check valve |
| Other | USB cable length (Part Number 4918419) | 2 | M | |
| Other | USB cable length (Part Number 4918591) | 5 | M | |
| Pressure | Cooling loop cooling water pressure limit | 270 | psi | installations where the discharge pressure is greater than 270 psi (pressure reducing valve required upstream of the cooling loop) |
| Pressure | Discharge set point pressure / maximum control pressure | 100/110, 170/175, or 240/250 | psi | set by the factory and not adjustable; specify at time of order |
| Pressure | VSPLC set point range | 100 to 400 | psi | |
| Voltage | INLINE™5 datalink adapter supply voltage (maximum) | +50 | VDC | power lamp fast flashing indicates greater than maximum |
| Voltage | INLINE™5 datalink adapter supply voltage (minimum) | +8 | VDC | power lamp slow flashing indicates less than minimum |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
1Connect the INLINE™5 Datalink Adapter to a Personal Computer installation
⚠ A fully populated USB cable, Part Number 4918419, or DB9F-DB9M serial cable, Part Number 4918418, must be used.
- Connect the DB9F-DB9M serial cable, Part Number 4918418, or USB cable, Part Number 4918419, to the computer.
- Connect the other end of that cable to the INLINE™5 datalink adapter, Part Number 3165033.
- Supply +8 VDC to +50 VDC at 250mA through the OEM connector or a separate power source.
- Connect the appropriate datalink cable to the INLINE™5 datalink adapter, Part Number 3165033.
- Connect the other end of the datalink cable to the vehicle cab or engine compartment datalink connector.
- Launch the electronic service tool application software.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Parts cataloged across the Cummins/Onan QSL9 family
130| Part # | Description | Category |
|---|
| 89285829 | Filter, air | Air filter |
| 89288971 | Element, air filter (main) | Air filter |
| 89288989 | Element, air filter (safety) | Air filter |
| 4021518 | Alternator Manual | Alternator |
| 431PSL6206 | Marathon Magna Plus / 431PSL6206 | Alternator |
| PI144D1 | Alternator Model | Alternator |
| UC274C | Alternator Model | Alternator |
| UC274K | Alternator Model | Alternator |
| 22113039 | Belt, drive | Belt |
| 0518-0548-15 | Clamp | Clamp |
| 0518-0548-22 | Clamp | Clamp |
| 0518-0548-29 | Clamp | Clamp |
| 0518-0548-35 | Clamp | Clamp |
| A056F113 | Clamp | Clamp |
| 22177745 | Conditioner, coolant | Coolant filter |
| QSL9-G2 | Cummins / QSL9-G2 | Engine |
| 22177711 | Filter, fuel | Fuel filter |
| 36845022 | Filter, fuel | Fuel filter |
| 35328251 | GASKET | Gasket |
| 39487830 | Gasket | Gasket |
| 89202022 | Element, with gaskets | Gasket |
| 89285761 | Element, with gaskets | Gasket |
| 89287346 | Gasket | Gasket |
| 89288492 | Gasket | Gasket |
| 89304059 | Gasket | Gasket |
| 89304067 | Gasket | Gasket |
| 95214524 | Gasket | Gasket |
| A052T655 | Gasket | Gasket |
| A047A980 | Heater, Blanket | Heater |
| 22138259 | Hose assembly | Hose |
| 36890650 | Hose assembly | Hose |
| 54378526 | Hose | Hose |
| 89299424 | Hose assembly | Hose |
| 92895267 | Hose | Hose |
| A045P359 | Hose, DEF | Hose |
| A045P417 | Hose, DEF | Hose |
| A051B439 | Hose, DEF | Hose |
| 22177737 | ENGINE OIL FILTER | Oil filter |
| 36860336 | ELEMENT, FILTER — compressor oil filter element | Oil filter |
| 1000A | LCD Ammeter | Service part / kit |
| 22354351 | HP, XP, MHP, VHP KIT–2000 HOURS | Service part / kit |
| 22354369 | SHP, XHP KIT–2000 HOURS | Service part / kit |
| 22354377 | KIT–1000 HOURS | Service part / kit |
| 22354385 | KIT–500 HOURS | Service part / kit |
| 22354393 | KIT–0–50 HOURS | Service part / kit |
| 35092279 | Filter assembly | Service part / kit |
| 35370063 | Element | Service part / kit |
| 35592534 | DIAPHRAGM | Service part / kit |
| 36756120 | Filter assembly | Service part / kit |
| 36844579 | 'Y' strainer | Service part / kit |
| 36844975 | BATTERY, 1000 CCA | Service part / kit |
| 54731617 | Separator, water | Service part / kit |
| 54731625 | Filter, primary | Service part / kit |
| 54738992 | Filter, secondary | Service part / kit |
| 54739057 | Element | Service part / kit |
| 54739065 | Element | Service part / kit |
| 89285161 | Element, separator | Service part / kit |
| 91112201 | Separator, water | Service part / kit |
| 92451962 | Filter | Service part / kit |
| 92452192 | Filter | Service part / kit |
| 92951075 | Kit, minimum pressure valve | Service part / kit |
| A030X751 | Box | Service part / kit |
| A030Y642 | Hinge | Service part / kit |
| A031A954 | Panel, Enclosure | Service part / kit |
| A034N673 | Grill, Enclosure | Service part / kit |
| A034N943 | Bolt, Carriage | Service part / kit |
| A034P011 | Bolt, Carriage | Service part / kit |
| A034P012 | Washer, Flat | Service part / kit |
| A034P026 | Screw, Hex Flange Head | Service part / kit |
| A034P039 | Nut | Service part / kit |
| A034P108 | Screw, Hex Flange Head | Service part / kit |
| A035H898 | Screw, Hex Head | Service part / kit |
| A035P345 | Lead, Electrical | Service part / kit |
| A041D550 | Header, Door | Service part / kit |
| A041E195 | Panel, Enclosure | Service part / kit |
| A041E396 | Panel, Enclosure | Service part / kit |
| A041E596 | Header, Door | Service part / kit |
| A041E928 | Post, Enclosure | Service part / kit |
| A041M317 | Door, Control | Service part / kit |
| A041S526 | Insulation, Door | Service part / kit |
| A046F214 | Panel, Enclosure | Service part / kit |
| A046F238 | Panel, Enclosure | Service part / kit |
| A047V570 | Panel, Window | Service part / kit |
| A052S411 | Latch | Service part / kit |
| A053J589 | Screw, Hex Head | Service part / kit |
| A053J591 | Screw, Hex Head | Service part / kit |
| A053T433 | Padlock, Attachment | Service part / kit |
| A055G556 | Screw, Socket Head | Service part / kit |
| A056C784 | Latch, Mechanical | Service part / kit |
| A056H470 | Hinge | Service part / kit |
| A056M306 | Bolt, Carriage | Service part / kit |
| A063L015 | Door, Enclosure | Service part / kit |
| A063L064 | Header, Door | Service part / kit |
| A063L069 | Header, Door | Service part / kit |
| A063L072 | Panel, Enclosure | Service part / kit |
| A063L080 | Panel, Enclosure | Service part / kit |
| A064U218 | Cover, Electrical Connector | Service part / kit |
| A072Y708 | Door, Enclosure | Service part / kit |
| A072Y709 | Panel, Enclosure | Service part / kit |
| V2403-M-E3BG | Engine Model | Service part / kit |
| A045J792 | Pump, Doser (See Page 70 for Components) | Pump |
| 0821-0016 | Screw, Locking | Screw |
| 0821-0029 | Screw, Locking | Screw |
| 0821-6002-03 | Screw, Hex Head | Screw |
| 0821-6003-01 | Screw, Hex Head | Screw |
| 22243141 | O–ring, IQ filter spacer | Seal |
| 22243158 | O–ring, IQ filter | Seal |
| 35279942 | O-RING | Seal |
| 35328244 | SEAL | Seal |
| 36865962 | Seal, grease | Seal |
| 92293661 | Seal, sight glass | Seal |
| 92864115 | Seal | Seal |
| 95765806 | 'O' Ring | Seal |
| 95823688 | 'O' Ring | Seal |
| A030Y648 | Edging, Seal | Seal |
| A047V572 | Seal, Weather | Seal |
| A054S414 | Seal, Door | Seal |
| A054S416 | Seal, Door | Seal |
| 22094759 | FUEL LEVEL SENDER | Sensor |
| 22102339 | COOLANT LWL SWH | Sensor |
| 22155451 | FUEL SENDER | Sensor |
| 36841138 | COMP. & ENGINE TEMP SENDER | Sensor |
| 36847838 | ENGINE/COMPR. AIR FILTER RESTRICTION SW. | Sensor |
| 36870608 | 150 PSI PRESSURE SENDER | Sensor |
| 36898922 | Sensor, temperature | Sensor |
| 36920825 | 0-100 PRESS TRANS | Sensor |
| 54496773 | 0-225 PRESS TRANS | Sensor |
| A046D072 | Strap, Tank | Strap |
| A049G884 | Tank, DEF Complete (Includes Header and Heated Blanket) (See Page 66 for Components) | Tank |
| 36893824 | Valve, thermostatic | Thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Common questions
What is the oil capacity of the Cummins/Onan QSL 9?
The Cummins/Onan QSL 9 engine has an oil capacity of 24.0 liters.
What is the displacement of the Cummins/Onan QSL 9?
The Cummins/Onan QSL 9 has a displacement of 8.9 liters with 6 cylinders.
Which generators use the Cummins/Onan QSL 9 engine?
The Cummins/Onan QSL 9 powers 5 generator set(s), including Cummins/Onan CFP9E-F40, Cummins/Onan CFP9E-F50, Cummins/Onan CFP9EVS-F40, Cummins/Onan CFP9EVS-F50, Cummins/Onan qsl9.