The Mitsubishi S4Q2-SD is a 2.51 L 4-cylinder athmo engine rated at 1500 rpm, producing up to 27.3 kW. It powers generator sets from SDMO, including the R22 and T 22 K. It holds 6.5 L (1.7 gal) of oil and 8.1 L (2.1 gal) of coolant.
Also known as: MITSUBISHI S4Q2-SD
Part of the Mitsubishi S4Q2 engine family — 8 variants share parts & fitment.
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
| Oil capacity | 6.5 L |
|---|---|
| Coolant capacity | 8.1 L |
| Displacement | 2.51 L |
| Cylinders | 4 |
| Aspiration | Athmo |
| Rated speed | 1500 rpm |
| Gross power | 27 kW |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | 330560552 | Amazon eBay $17.99 PartsGeek $11.97 | |||
| Oil filter | 330560546 | Amazon eBay $28.08 | |||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | 8.1 L | — | |||
| Oil | 6.5 L | — | |||
| Spark plug | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 30801032101NE | Dusty air filter assembly | air_filter |
| 330170365 | Belt | belt |
| 330910098 | Coolant GENCOOL (20L) | fluid |
| 330910115 | Oil GENLUB TDX 20L | fluid |
| 330170614 | Water pump gasket | gasket |
| 330170777 | Exhaust gasket | gasket |
| 330170780 | Gasket | gasket |
| 330170844 | Gasket | gasket |
| 330171211 | Gasket | gasket |
| 330171571 | Gasket | gasket |
| 330171575 | Gasket | gasket |
| 330171484 | Durit | hose |
| 330171692 | Durit | hose |
| 330171942 | Lower Durit | hose |
| 330171943 | Upper radiator Durit | hose |
| 330170272 | Oil filter | oil_filter |
| AEHQ5682-03 | 304C CR Mini Hydraulic Excavator | other_service |
| AEHQ5683 | 305C CR Mini Hydraulic Excavator | other_service |
| AEHQ5683-03 | 305C CR Mini Hydraulic Excavator | other_service |
| AEHQ6016 | 904H Compact Wheel Loader | other_service |
| 31810015101NK | Oil drain pump assembly | pump |
| 330170513 | Water pump | pump |
| 330170581 | Oil pump | pump |
| 31101077801NK | Coolant temp. and oil pressure sender assembly | sensor |
| 330170377 | Thermostat | thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Mitsubishi S4Q2-SD engine has an oil capacity of 6.5 liters.
The Mitsubishi S4Q2-SD has a displacement of 2.51 liters with 4 cylinders.
The Mitsubishi S4Q2-SD powers 2 generator set(s), including SDMO R22, SDMO T 22 K.
The Mitsubishi S4Q2-SD uses oil filter part numbers Sdmo 330560546, Mitsubishi MD162326M, Donaldson P502051.
The Mitsubishi S4Q2-SD uses fuel filter part numbers Sdmo 330560552, Mitsubishi D070001, Donaldson P551423.
The Mitsubishi S4Q2-SD uses air filter part numbers Sdmo 330570079, Sdmo 330570156, Sdmo 330570162.