The Cummins/Onan QSL9-G3 is a 8.9 L 6-cylinder turbo charged after cooled engine rated at 1500 rpm. It powers generator sets from AKSA, Cummins/Onan and MQ Power, including the APSD400, C250 D2R and DQDAA-6070073. It holds 27.6 L (7.3 gal) of oil and 36.5 L (9.6 gal) of coolant.
Also known as: Cummins QSL9-G3, QSL9 G3
Part of the Cummins/Onan QSL9 engine family — 17 variants share parts & fitment.
| Oil capacity | 27.6 L |
|---|---|
| Coolant capacity | 36.5 L |
| Displacement | 8.9 L |
| Cylinders | 6 |
| Aspiration | Turbo Charged After Cooled |
| Rated speed | 1500 rpm |
Shared across brands: AKSA, Cummins/Onan, MQ Power
How to read your Cummins/Onan engine serial & model number →
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Oil filter | Changed 3/13/2025 at 302 HRS | — | |||
| Battery | 2, 4D (Cores) | — | |||
| Coolant | -40 | 6.0 gal | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| valve clearance | Check | 2000 hr | B-Series (4BT3.3): valve clearance checks not required for 2000 hours, twice the industry standard | |
| engine overhaul | Other | 20000 hr | QSK23-Series: expected life cycle to 20,000 hours before first overhaul |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | -40 freeze protection | 6.0 gal | 6 Gal added |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| 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.
The Cummins/Onan QSL9-G3 engine has an oil capacity of 27.6 liters.
The Cummins/Onan QSL9-G3 has a displacement of 8.9 liters with 6 cylinders.
The Cummins/Onan QSL9-G3 powers 5 generator set(s), including AKSA APSD400, Cummins/Onan C250 D2R, Cummins/Onan DQDAA-6070073, Cummins/Onan QSL9-G3, MQ Power MQP240.