The Mitsubishi S3L2 is a 1.32 L 3-cylinder natural-aspirated engine rated at 1800 rpm, producing up to 15.4 kW. It powers generator sets from Mitsubishi. It holds 0.34 L (0.1 gal) of oil.
Also known as: Mitsubishi S3L2
Part of the Mitsubishi S3L2 engine family — 8 variants share parts & fitment.
| Oil capacity | 0.34 L |
|---|---|
| Displacement | 1.318 L |
| Cylinders | 3 |
| Aspiration | Natural-aspirated |
| Rated speed | 1800 rpm |
| Gross power | 15 kW |
Step-by-step procedures compiled from the Mitsubishi service manual for this engine.
| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Coolant level | Check | 10 hr | Pre-Start Inspection | |
| Engine oil level | Check | 10 hr | Pre-Start Inspection | |
| Fuel level | Check | 10 hr | Pre-Start Inspection | |
| Walk-around inspection | Inspect | 10 hr | Pre-Start Inspection | |
| Battery electrolyte level and specific gravity | Check | 50 hr | ||
| Fuel tank and water separator | Drain | 50 hr | Drain water and sediment | |
| Nuts and bolts | Other | 1000 hr | First service — Retighten | |
| Fuel filter element | Clean | 100 hr | After cleaning, prime | |
| Radiator fins | Clean | 100 hr | ||
| Engine oil | Change | 250 hr | 12 mo | First service — Or once a year (whatever comes first) |
| Oil filter | Change | 250 hr | 12 mo | First service — Or once a year (whatever comes first) |
| Fan belt | Adjust | 500 hr | Deflection: 13 mm (0.5 in.) | |
| Fuel filter element | Change | 500 hr | After changing, prime | |
| Glow plugs | Check | 500 hr | ||
| Injection pressure | Adjust | 500 hr | 140 kgf/cm2 (1 991 psi) [13 729 kPa] | |
| Valve clearance | Adjust | 500 hr | 0.25 mm (0.0098 in.) for both inlet and exhaust valves | |
| Alternator | Check | 1000 hr | ||
| Starter | Check | 1000 hr | ||
| Turbocharger | Check | 1000 hr | See turbocharger manual | |
| Coolant | Change | 24 mo | Every 2 Years |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Clearance between camshaft journal and bushing | 0.15 | mm (0.005 9 in.) | limit |
| Clearance | Clearance between crankpin and connecting rod bearing | 0.025 to 0.072 | mm (0.000 98 to 0.002 83) | standard |
| Clearance | Clearance between idler gear and shaft | 0.03 to 0.07 | mm (0.001 2 to 0.002 8) | standard |
| Clearance | Clearance between journal and main bearing | 0.030 to 0.077 | mm (0.001 18 to 0.003 03) | standard |
| Clearance | Clearance between piston pin and piston | 0.006 to 0.018 | mm (0.000 24 to 0.000 71) | standard |
| Clearance | Clearance between rocker arm and shaft | 0.012 to 0.050 | mm (0.000 47 to 0.001 97) | standard |
| Clearance | Clearance between tappet and cylinder block | 0.15 | mm (0.005 9 in.) | limit |
| Clearance | Clearance between valve stem and valve guide (exhaust valve) | 0.05 to 0.085 | mm (0.002 0 to 0.003 35) | standard |
| Clearance | Clearance between valve stem and valve guide (inlet valve) | 0.02 to 0.05 | mm (0.000 8 to 0.002 0) | standard |
| Clearance | End play for crankshaft | 0.050 to 0.175 | mm (0.001 97 to 0.006 89) | standard |
| Clearance | Fan belt deflection | 10 to 12 | mm (0.4 to 0.5 in.) | under 10 kgf (22 lbf) [98 N] force midway between alternator pulley and crankshaft pulley |
| Clearance | Thrust clearance for connecting rod big end | 0.10 to 0.35 | mm (0.003 9 to 0.013 8) | standard |
| Clearance | Timing gear backlash (crankshaft gear and idler gear) | 0.04 to 0.12 | mm (0.001 6 to 0.004 7) | standard |
| Clearance | Timing gear backlash (fuel injection pump camshaft gear and oil pump gear) | 0.07 to 0.20 | mm (0.002 8 to 0.007 9) | standard |
| Clearance | Timing gear backlash (idler gear and camshaft gear / idler gear and fuel injection pump camshaft gear / camshaft gear and P.T.O. gear) | 0.08 to 0.19 | mm (0.003 1 to 0.007 5) | standard |
| Gap | Piston ring end gap (No. 1 compression ring) | 0.15 to 0.30 | mm (0.005 9 to 0.011 8) | standard |
| Gap | Piston ring end gap (No. 2 compression ring) | 0.15 to 0.35 | mm (0.005 9 to 0.013 8) | standard |
| Gap | Piston ring end gap (Oil ring) | 0.20 to 0.40 | mm (0.007 9 to 0.015 7) | standard |
| Gap | Starter pinion gap (pinion clearance) | 0.5 to 2.0 | mm (0.020 to 0.079 in.) | |
| Injection timing | Fuel injection timing (BTDC) | 17 | degrees | |
| Pressure | Compression pressure (SL) | 30 | kgf/cm2 (427 psi) [2 942 kPa] | at 290 rpm, standard |
| Pressure | Compression pressure (SL2) | 32 | kgf/cm2 (455 psi) [3 138 kPa] | at 290 rpm, standard |
| Pressure | Fuel injection pressure (valve opening pressure) | 1400 +5 | kgf/cm2 (1 9910 +71 psi) [13 7290 +490 kPa] | |
| Pressure | Pressure difference at which oil pressure switch is closed | 0.5 ± 0.1 | kgf/cm2 (7 ± 1.4 psi) [49 ± 10 kPa] | |
| Pressure | Pressure relief valve setting | 3.5 ± 0.5 | kgf/cm2 (50 ± 7 psi) [343 ± 49 kPa] | |
| Resistance | Glow plug resistance | 0.55 | Ω | |
| Resistance | Resistance in thermounit | 50°C: 80 ± 10; 80°C: 29.5 ± 2.5; 120°C: 10 ± 0.3 | Ω | |
| Speed | Alternator regulated voltage | 14.7 ± 0.3 | V | at 20°C (68°F) |
| Speed | Starter no-load speed (M1T68281) | 3000 minimum | rpm | terminal voltage 11.5 V |
| Speed | Starter no-load speed (M8T70471) | 3850 minimum | rpm | terminal voltage 11 V |
| Temperature | Ring gear installation temperature | 150 | °C (302°F) | |
| Temperature | Thermostat valve lift 8 mm | 95 | °C (203°F) | |
| Temperature | Thermostat valve starts opening | 82 ± 1.5 | °C (180 ± 2.7°F) | |
| Temperature | Thermoswitch turns ON | 111 ± 3.5 | °C (232 ± 6.3°F) | |
| Torque | Air inlet cover / exhaust manifold bolt | 1.85 ± 0.35 | kgf·m (13.4 ± 2.5 lbf·ft) [18 ± 3.4 N·m] | |
| Torque | Connecting rod cap nut | 3.55 ± 0.25 | kgf·m (25.7 ± 2 lbf·ft) [34.8 ± 2.5 N·m] | |
| Torque | Crankshaft pulley nut | 17.5 ± 2.5 | kgf·m (127 ± 18 lbf·ft) [172 ± 25 N·m] | |
| Torque | Cylinder head bolt | 9 ± 0.5 | kgf·m (65 ± 4 lbf·ft) [88 ± 5 N·m] | |
| Torque | Delivery valve holder | 4.5 ± 0.5 | kgf·m (32.5 ± 4 lbf·ft) [44 ± 5 N·m] | |
| Torque | Flywheel bolt | 13.5 ± 0.5 | kgf·m (98 ± 4 lbf·ft) [132 ± 5 N·m] | |
| Torque | Fuel injection nozzle holder | 5.5 ± 0.5 | kgf·m (40 ± 4 lbf·ft) [54 ± 5 N·m] | |
| Torque | Fuel injection pipe nut | 3 ± 0.5 | kgf·m (22 ± 4 lbf·ft) [29 ± 5 N·m] | |
| Torque | Fuel leak-off pipe nut | 2.75 ± 0.25 | kgf·m (20 ± 2 lbf·ft) [27 ± 2.5 N·m] | |
| Torque | Glow plug | 1.75 ± 0.25 | kgf·m (12.7 ± 1.8 lbf·ft) [17.2 ± 2.5 N·m] | |
| Torque | Glow plug connection plate | 0.125 ± 0.025 | kgf·m (0.9 ± 0.2 lbf·ft) [1.2 ± 0.2 N·m] | |
| Torque | Main bearing cap bolt | 5.25 ± 0.25 | kgf·m (38 ± 2 lbf·ft) [51.5 ± 2.5 N·m] | |
| Torque | Oil filter | 1.2 ± 0.1 | kgf·m (8.7 ± 0.7 lbf·ft) [12 ± 1 N·m] | |
| Torque | Oil pan bolt (for tractor engine) | 2.8 ± 0.3 | kgf·m (20.3 ± 2.2 lbf·ft) [27.5 ± 3 N·m] | cast oil pan |
| Torque | Oil pan bolt (plate oil pan) | 1.15 ± 0.15 | kgf·m (8.3 ± 1.1 lbf·ft) [11.3 ± 1.5 N·m] | plate oil pan |
| Torque | Oil pan drain plug | 4 ± 0.5 | kgf·m (29 ± 4 lbf·ft) [39 ± 5 N·m] | |
| Torque | Oil pressure switch | 1 ± 0.2 | kgf·m (7.2 ± 1.4 lbf·ft) [10 ± 2 N·m] | |
| Torque | Pressure relief valve | 5 ± 0.5 | kgf·m (36 ± 4 lbf·ft) [49 ± 5 N·m] | |
| Torque | Rear plate bolt (for tractor engine) | 9.5 ± 1 | kgf·m (69 ± 7 lbf·ft) [93 ± 10 N·m] | |
| Torque | Rear plate bolt (standard) | 6.5 ± 1 | kgf·m (47 ± 7 lbf·ft) [64 ± 10 N·m] | |
| Torque | Retaining nut for delivery valve holder body | 3.75 ± 0.25 | kgf·m (27 ± 2 lbf·ft) [37 ± 2.5 N·m] | |
| Torque | Rocker cover bolt | 1.15 ± 0.15 | kgf·m (8.3 ± 1.1 lbf·ft) [11.3 ± 1.5 N·m] | |
| Torque | Rocker shaft bracket bolt | 1.5 ± 0.5 | kgf·m (11 ± 4 lbf·ft) [14.7 ± 5 N·m] | |
| Torque | Sliding sleeve shaft | 3.6 ± 0.6 | kgf·m (26 ± 4.3 lbf·ft) [35 ± 6 N·m] | |
| Torque | Special nut for torque spring set | 2 ± 0.5 | kgf·m (14 ± 4 lbf·ft) [20 ± 5 N·m] | |
| Torque | Starter B terminal | 1.1 ± 0.1 | kgf·m (8 ± 0.7 lbf·ft) [10.8 ± 1 N·m] |
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 |
|---|---|---|---|---|---|
| Engine oil | SAE 5W-20 / SAE 10W-30 / SAE 15W-40 / SAE 30 / SAE 40 | API Service Classification CF or CF-4 (also CC or better) | See recommended oil viscosities chart; starting temperature range -30°C (-22°F) to 40°C (104°F). Oil capacity (high level, excl. 0.5 l in oil filter): S3L/S3L2 3.7 l (standard pan) / 5.7 l (deep pan); S4L/S4L2 5.4 l (standard pan) / 7.7 l (deep pan). First 50 h and every 250 h or yearly. | ||
| Fuel | Diesel fuel | See chapter 7 (operation manual) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
⚠ Fuel will come from the injection pipe with high pressure if engine is equipped with an electric fuel pump.
⚠ Make sure valve clearance and injection timing are correct and injection nozzles have no defect.
⚠ Make an adjustment to the valve clearance when the engine is cold.
⚠ After adjusting all cylinders, turn crankshaft two or three times and re-check valve clearance.
Tools: feeler gauge
⚠ Be sure to measure the compression pressure on all cylinders.
⚠ Check engine rpm at the time of measuring the compression pressure.
Tools: Compression gauge and adaptor ST332270
⚠ Turn valve lever to OPEN position before loosening any air vent screw.
⚠ Do not cause damage to the O-ring when installing the filter.
Tools: filter wrench
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| Control timer connection No. 1 - Solenoid (ETS) | Blue | ETS solenoid type key shutoff system | ||
| Control timer connection No. 2 - Solenoid (ETS) | Blue | ETS solenoid type key shutoff system | ||
| Control timer connection No. 3 - Battery (starter switch B terminal) (ETS) | Red | ETS solenoid type key shutoff system | ||
| Control timer connection No. 4 - Starter switch ON terminal (ETS) | Green | ETS solenoid type key shutoff system | ||
| Control timer connection No. 5 - Starter (starter switch and starter) (ETS) | Red/white | ETS solenoid type key shutoff system | ||
| Control timer connection No. 6 - Oil pressure switch (ETS) | Yellow | ETS solenoid type key shutoff system | ||
| Control timer connection No. 7 - Ground (ETS) | Black | ETS solenoid type key shutoff system | ||
| ETR solenoid - COM (earth)/ground | Blue (No. 3) | ETR solenoid type key shutoff system | ||
| ETR solenoid - HOLD (hold-in coil)/starter switch | White (No. 2) | ETR solenoid type key shutoff system | ||
| ETR solenoid - PULL (pull-in coil)/starter | Red (No. 1) | ETR solenoid type key shutoff system; stroke 13 ± 0.5 mm (0.51 ± 0.02 in.) |
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 |
|---|---|---|
| AEHQ5471-01 | Double element air filter | Air filter |
| A7T02071C | Alternator (AC generator, IC regulator, 12 - 50 A) | Alternator |
| 008816-4C | Glow plug (sheathed type, rated voltage 10.5 V, current draw 9.7 ± 1.0 A) | Glow plug |
| MM431-28201 | Glow plug relay (DC 12 V, continuous rating 1 minute, coil resistance 13 Ω) | Glow plug |
| DN15PD6 | Fuel injection nozzle (throttle type) | Injector |
| 05125-00102 | Battery switch | Service part / kit |
| 31A66-06100 | Controller (ETR stop solenoid system) | Service part / kit |
| 530050 | Road trailer for XP-T9KM-ALIZE UK and XP-T12K-ALIZE UK | Service part / kit |
| ALR190-I03 | ALR Series Linear Actuator | Service part / kit |
| ALR190-M04 | ALR Series Linear Actuator | Service part / kit |
| I6A11-14000 | Control timer unit (ETS), input voltage range DC 9 to 15 V | Service part / kit |
| I6A12-02001 | Control timer unit (ETR) | Service part / kit |
| MM130-767 | Safety relay | Service part / kit |
| MM431-762 | Glow timer (quick heating, DC 12 V, pre-glow time 6.2 ± 0.7 seconds) | Service part / kit |
| MM434-062 | Diode | Service part / kit |
| 30A60-00200 | Fuel pump (electric diaphragm, remote; 300 cc/min minimum or 400 cc/min minimum at DC 12 V and 20°C) | Pump |
| 31A90-00100 | Oil pressure switch | Sensor |
| MC880-900 | Thermoswitch (ETR) | Sensor |
| MM130-066 | Pressure switch (ETR) | Sensor |
| MM432-104 | Thermoswitch (ETS) | Sensor |
| 30890-05200 | Starter switch | Starter |
| 32A66-19100 | Starter relay | Starter |
| M1T68281 | Starter (DC solenoid shifted with reduction gear, 12 - 1.7 kW) | Starter |
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.
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 S3L2 engine has an oil capacity of 0.34 liters.
The Mitsubishi S3L2 has a displacement of 1.318 liters with 3 cylinders.
The Mitsubishi S3L2 powers 1 generator set(s), including Mitsubishi S3L2.