The Mitsubishi S4S-SD is a 3.33 L 4-cylinder engine rated at 1500 rpm. It powers generator sets from Kohler and SDMO, including the KM25M, KM30U, KM33 and T25KM. It holds 9 L (2.4 gal) of oil and 8.9 L (2.4 gal) of coolant.
Part of the Mitsubishi S4S engine family — 6 variants share parts & fitment.
| Oil capacity | 9.0 L |
|---|---|
| Coolant capacity | 8.9 L |
| Displacement | 3.33 L |
| Cylinders | 4 |
| Rated speed | 1500 rpm |
Shared across brands: Kohler, SDMO
| Part # | Description | Category |
|---|---|---|
| 70257024 | Air, Primary | air_filter |
| 70257029 | Air, Secondary | air_filter |
| 70638731 | Air | air_filter |
| AF1733K | Air, Primary | air_filter |
| AF4103 | Air, Secondary | air_filter |
| AF448 | Air | air_filter |
| M125 | Cover (outdoor version) | cover |
| M126 | Cover (outdoor version) | cover |
| M127 | Cover (outdoor version) | cover |
| 1R-0749 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0750 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0751 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0755 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0756 | High Efficiency Fuel Filter | fuel_filter |
| 1R-0766 | High Efficiency Fuel Filter | fuel_filter |
| 4024232 | Fuel, Box Style | fuel_filter |
| 74036432 | Fuel, Primary | fuel_filter |
| FF5045 | Fuel, Primary | fuel_filter |
| FS1205 | Fuel/Water Separator | fuel_filter |
| 70098441 | Hydraulic | hydraulic_filter |
| 73010360 | Hydraulic | hydraulic_filter |
| 73019695 | Hydraulic | hydraulic_filter |
| HF6021 | Hydraulic | hydraulic_filter |
| HF6223 | Hydraulic | hydraulic_filter |
| LF520 | Hydraulic | hydraulic_filter |
| 74349986 | Lube, Full Flow | oil_filter |
| LF503 | Lube, Full Flow | oil_filter |
| LF640 | Lube, Full Flow | oil_filter |
| 061004 | 018 250 ml Nuts’n bolts 420 low strength | other_service |
| 093983 | Extra high-efficiency heat transfer compound. | other_service |
| 2021D0309 | Data Link Cable | other_service |
| 323009 | 7 mil, ¾" x 66' | other_service |
| 323010 | 8.5 mil, ¾" x 66' | other_service |
| 323011 | Net wt 2.36 oz Tube | other_service |
| 323012 | Net wt 2.36 oz Tube | other_service |
| 3519178C91 | Resistor Cap for 3 way connector that mates to 1667741C1 | other_service |
| 3544372C91 | Resistor Cap for 6 way connector that mates to control modules | other_service |
| 3572112R1 | J1939 Cable | other_service |
| 363003 | 121 lb keg | other_service |
| 363009 | Net wt 9 oz Can | other_service |
| 363120 | 5 Gallon Storage Bucket with Lid Seat | other_service |
| 363130 | 101 (Refill Pack) | other_service |
| 363136 | Net wt 5 oz Can | other_service |
| 363155 | Net wt 5 oz Can | other_service |
| 363161 | Net wt 12 oz Can | other_service |
| 363542 | 5 Gallon Pail | other_service |
| 365209 | Centerfeed dispenser | other_service |
| 365213 | Approximately 1700/case | other_service |
| 365215 | Approximately 1650/case | other_service |
| 365296 | 012 | 12 bottles/case | other_service |
| 365353 | 16 packs/case | other_service |
| 365414 | Tape dispenser | other_service |
| 70623049 | Transmission | other_service |
| AMOH1170 | Inframe Kit AMOH1170 | other_service |
| PEDJ0047 | Cat Diesel Particulate Solutions for Cat 3400, 3500 and 3600 Series Diesel Engines | other_service |
| i01329161 | Equipment Lowering with Engine Stopped | other_service |
| i02518481 | Parking | other_service |
| i07746366 | Slope Operation | other_service |
| i07776654 | Sound Information and Vibration Information | other_service |
| 363139 | 32 oz Bottle Hand Pump | pump |
| 363142 | 55 Gallon Drum Plastic Pump | pump |
| 363541 | Hand Pump for 5 Gallon | pump |
| M-2746717 | Pressure - Atom. Air | sensor |
| PEHP7069-01 | Reman Water Pump | water_pump |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Parts listed by aftermarket suppliers as fitting this engine — leads compiled from supplier catalogs; verify the exact part for your serial number.
The Mitsubishi S4S-SD engine has an oil capacity of 9.0 liters.
The Mitsubishi S4S-SD has a displacement of 3.33 liters with 4 cylinders.
The Mitsubishi S4S-SD powers 5 generator set(s), including Kohler KM25M, Kohler KM30U, Kohler KM33, SDMO T25KM, SDMO T33K.