The Cummins/Onan QSL9-G2 is a 8.8 L 6-cylinder turbocharged engine rated at 1800 rpm, producing up to 239 kW. It powers generator sets from MQ Power, including the 1200 Amp Diesel Studio Generator, 1400 Amp Diesel Studio Generator, 1800 Amp Diesel Studio Generator and EGS1600C3H. It holds 7 L (1.8 gal) of oil and 29.5 L (7.8 gal) of coolant.
Also known as: Cummins QSL9-G2
Part of the Cummins/Onan QSL9 engine family — 12 variants share parts & fitment.
| Oil capacity | 7.0 L |
|---|---|
| Coolant capacity | 29.5 L |
| Displacement | 8.8 L |
| Cylinders | 6 |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
| Gross power | 239 kW |
How to read your Cummins/Onan engine serial & model number →
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Replaceable, Paper insert | — | 100 hr | ||
| Fuel filter | Spin-on type | — | 100 hr | ||
| Oil filter | Full flow, spin-on | — | 100 hr | ||
| Battery | 2 x 750 cca | — | 100 hr | ||
| Belt | Mechanical Fan Drive | — | 100 hr | ||
| Spark plug | N/A | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 4021518 | Alternator Manual | alternator |
| 431PSL6206 | Marathon Magna Plus / 431PSL6206 | alternator |
| PI144D1 | Alternator Model | alternator |
| UC274C | Alternator Model | alternator |
| UC274K | Alternator Model | alternator |
| 0518-0548-15 | Clamp | clamp |
| 0518-0548-22 | Clamp | clamp |
| 0518-0548-29 | Clamp | clamp |
| 0518-0548-35 | Clamp | clamp |
| A056F113 | Clamp | clamp |
| QSL9-G2 | Cummins / QSL9-G2 | engine |
| A052T655 | Gasket | gasket |
| A047A980 | Heater, Blanket | heater |
| A045P359 | Hose, DEF | hose |
| A045P417 | Hose, DEF | hose |
| A051B439 | Hose, DEF | hose |
| 1000A | LCD Ammeter | other_service |
| A030X751 | Box | other_service |
| A030Y642 | Hinge | other_service |
| A031A954 | Panel, Enclosure | other_service |
| A034N673 | Grill, Enclosure | other_service |
| A034N943 | Bolt, Carriage | other_service |
| A034P011 | Bolt, Carriage | other_service |
| A034P012 | Washer, Flat | other_service |
| A034P026 | Screw, Hex Flange Head | other_service |
| A034P039 | Nut | other_service |
| A034P108 | Screw, Hex Flange Head | other_service |
| A035H898 | Screw, Hex Head | other_service |
| A035P345 | Lead, Electrical | other_service |
| A041D550 | Header, Door | other_service |
| A041E195 | Panel, Enclosure | other_service |
| A041E396 | Panel, Enclosure | other_service |
| A041E596 | Header, Door | other_service |
| A041E928 | Post, Enclosure | other_service |
| A041M317 | Door, Control | other_service |
| A041S526 | Insulation, Door | other_service |
| A046F214 | Panel, Enclosure | other_service |
| A046F238 | Panel, Enclosure | other_service |
| A047V570 | Panel, Window | other_service |
| A052S411 | Latch | other_service |
| A053J589 | Screw, Hex Head | other_service |
| A053J591 | Screw, Hex Head | other_service |
| A053T433 | Padlock, Attachment | other_service |
| A055G556 | Screw, Socket Head | other_service |
| A056C784 | Latch, Mechanical | other_service |
| A056H470 | Hinge | other_service |
| A056M306 | Bolt, Carriage | other_service |
| A063L015 | Door, Enclosure | other_service |
| A063L064 | Header, Door | other_service |
| A063L069 | Header, Door | other_service |
| A063L072 | Panel, Enclosure | other_service |
| A063L080 | Panel, Enclosure | other_service |
| A064U218 | Cover, Electrical Connector | other_service |
| A072Y708 | Door, Enclosure | other_service |
| A072Y709 | Panel, Enclosure | other_service |
| V2403-M-E3BG | Engine Model | other_service |
| 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 |
| A030Y648 | Edging, Seal (3.304 FT) | seal |
| A047V572 | Seal, Weather | seal |
| A054S414 | Seal, Door | seal |
| A054S416 | Seal, Door | seal |
| A046D072 | Strap, Tank | strap |
| A049G884 | Tank, DEF Complete (Includes Header and Heated Blanket) (See Page 66 for Components) | tank |
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-G2 engine has an oil capacity of 7.0 liters.
The Cummins/Onan QSL9-G2 has a displacement of 8.8 liters with 6 cylinders.
The Cummins/Onan QSL9-G2 powers 4 generator set(s), including MQ Power 1200 Amp Diesel Studio Generator, MQ Power 1400 Amp Diesel Studio Generator, MQ Power 1800 Amp Diesel Studio Generator, MQ Power EGS1600C3H.