Mitsubishi S4Q2-Y362SD Engine
The Mitsubishi S4Q2-Y362SD is a 2.5 L 4-cylinder naturally aspirated engine rated at 1800 rpm, producing up to 24.3 kW. It powers generator sets from Kohler, including the 20REOZT. It holds 6.5 L (1.7 gal) of oil and 6 L (1.6 gal) of coolant.
Also known as: MITSUBISHI S4Q2-Y362SD
Part of the Mitsubishi S4Q2 engine family — 8 variants share parts & fitment.
Service parts for the S4Q2-Y362SD
The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.
Air intake
1 requiredMD623028Air filterfind
Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.
Engine specifications
| Oil capacity | 6.5 L |
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| Coolant capacity | 6.0 L |
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| Displacement | 2.5 L |
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| Cylinders | 4 |
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| Aspiration | Naturally aspirated |
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| Rated speed | 1800 rpm |
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| Gross power | 24 kW |
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Maintenance schedule
| Item | Spec | Capacity | Part # | Interval | |
|---|
| Air filter | Every 250 Service Hours or once a year | | — | 250 hr | |
| Fuel filter | Every 500 Service Hours | | D070001 | 500 hr | Amazon eBay $50.61 KuduParts $17.00 |
| Oil filter | Oil filter | | MD162326M | 100 hr | Amazon eBay $28.08 |
| Battery | N/A | | — | 100 hr | |
| Belt | Every 500 Service Hours | | — | 500 hr | |
| Coolant | Every 2 Years | 2.0 not specified | — | 2 hr | |
| Oil | Every 500 Service Hours | 2.0 not specified | — | 500 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.
Parts cataloged across the Mitsubishi S4Q2 family
25| 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 | Service part / kit |
| AEHQ5683 | 305C CR Mini Hydraulic Excavator | Service part / kit |
| AEHQ5683-03 | 305C CR Mini Hydraulic Excavator | Service part / kit |
| AEHQ6016 | 904H Compact Wheel Loader | Service part / kit |
| 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.
Aftermarket parts that fit this engine
8Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
Filters for this engine
- Air filter: Mitsubishi MD623028 Mitsubishi 1348726 Mitsubishi 91B6100800 Donaldson P772578 Donaldson P821575 Donaldson P822768 Donaldson P822858 Wix 42801
- Fuel filter: Mitsubishi D070001 Donaldson P551423 Wix WF10091
- Oil filter: Mitsubishi MD162326M Donaldson P502051 Baldwin B161-S
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Also used in
5- Caterpillar 304C — Excavator Tracked
- Caterpillar 305C — Excavator Tracked
- Orenstein & Koppel 1.48 — Construction Equipment
- Terex HR18 — Excavator Compact
- Westerbeke 44B FOUR — Engine
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.
Common questions
What is the oil capacity of the Mitsubishi S4Q2-Y362SD?
The Mitsubishi S4Q2-Y362SD engine has an oil capacity of 6.5 liters.
What is the displacement of the Mitsubishi S4Q2-Y362SD?
The Mitsubishi S4Q2-Y362SD has a displacement of 2.5 liters with 4 cylinders.
Which generators use the Mitsubishi S4Q2-Y362SD engine?
The Mitsubishi S4Q2-Y362SD powers 1 generator set(s), including Kohler 20REOZT.
What oil filter does the Mitsubishi S4Q2-Y362SD use?
The Mitsubishi S4Q2-Y362SD uses oil filter part numbers Mitsubishi MD162326M, Donaldson P502051, Baldwin B161-S.
What fuel filter does the Mitsubishi S4Q2-Y362SD use?
The Mitsubishi S4Q2-Y362SD uses fuel filter part numbers Mitsubishi D070001, Donaldson P551423, Wix WF10091.
What air filter does the Mitsubishi S4Q2-Y362SD use?
The Mitsubishi S4Q2-Y362SD uses air filter part numbers Mitsubishi MD623028, Mitsubishi 1348726, Mitsubishi 91B6100800.
How often should you change the oil in the Mitsubishi S4Q2-Y362SD?
The Mitsubishi S4Q2-Y362SD oil change interval is every 500 hours.