Specifications
| Fuel | Diesel fuel (ASTM No. 2-D) |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 10.8 kW |
| Standby kVA | 11 |
| Prime power | 9.7 kW |
| Emissions | US EPA Tier 4a / EU Stage 2 constant |
| Oil capacity | 4.2 L |
| Voltage options | 12 V, 50 V |
| Dry weight | 135 kg |
Engine
| Oil capacity | 0.34 L |
|---|---|
| Displacement | 1.318 L |
| Aspiration | Natural-aspirated |
| Rated speed | 1800 rpm |
Filters for the Mitsubishi S3L2
3Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P502007 | Lube Filter, Spin-On Full Flow | MITSUBISHI 30A4000100, MITSUBISHI 30A4000100A, NAPA 67356, BALDWIN B1402 | FridayParts $13.99 |
| Fuel filter | P550057 | Fuel Filter, Spin-On | NAPA 3386, WALGAHN-MOTORENTECHN 00811389, WALGAHN-MOTORENTECHN 00850112, LOESING 025095 | KuduParts $12.00 FridayParts $34.80 |
| Fuel / water separator | P551423 | Fuel Filter, Water Separator Spin-On | MITSUBISHI D070001, NAPA 3531, NAPA 600091, NAPA 600092 | KuduParts $18.00 FridayParts $20.00 |
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Paper-element type | — | 500 hr | ||
| Fuel filter | Paper element (remote) type | — | 500 hr | ||
| Oil filter | Paper-element cartridge (full flow) type | — | 250 hr | ||
| Battery | 12V, 65 Ah or more (S3L/S3L2); 12V, 80 Ah or more (S4L/S4L2) | — | 50 hr | ||
| Belt | LL or HM type (width = 10.7 mm (0.42 in.), V angle = 38°, outer circumference = 980 mm (38.6 in.)) | — | 500 hr | ||
| Coolant | Engine proper only | — | |||
| Oil | API Service Classification CF or CF-4 (also listed as CC or better); SAE 5W-20 / 10W-30 / 15W-40 / 30 / 40 per ambient temperature | — | 250 hr |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Service intervals
20| 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.
Service specifications
60| 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.
Recommended fluids
| 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.
Procedures
7Fan belt deflection check and adjustment adjustment
- Measure belt deflection by applying 10 kgf (22 lbf) [98 N] force midway between alternator pulley and crankshaft pulley.
- If deflection is not correct, loosen the adjusting bolt and move the alternator to obtain required belt deflection.
Fuel injection timing inspection and adjustment adjustment
⚠ Fuel will come from the injection pipe with high pressure if engine is equipped with an electric fuel pump.
- Close fuel filter valve; disconnect No. 1 fuel injection pipe from cylinder head and injection pump.
- Remove No. 1 delivery valve holder, delivery valve and spring; restore holder only.
- Connect fuel injection pipe to injection pump; hold speed control lever in low speed position.
- Open fuel filter valve; turn starter switch key ON and slowly turn crankshaft clockwise.
- Fuel injection timing is correct if IT mark on crankshaft pulley aligns with mark on timing gear case when fuel stops.
- If timing is incorrect, change thickness of shims under fuel injection pump.
- Increase shim thickness to retard timing or decrease it to advance the timing.
- Restore delivery valve and injection pipe; apply sealant to both faces of each shim.
Idle RPM setting adjustment
⚠ Make sure valve clearance and injection timing are correct and injection nozzles have no defect.
- Start and run engine at low idle until coolant temperature is above 60°C (140°F).
- Loosen lock nut for idling set bolt and turn set bolt to obtain specified low idle rpm; tighten lock nut.
- Loosen lock nut for high-idle set bolt and turn set bolt to obtain specified high idle rpm; tighten lock nut.
Valve clearance adjustment adjustment
⚠ 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
- Slightly loosen cylinder head bolts and retighten to specified torque in number sequence.
- Find TDC compression position for No. 1 piston using the TDC mark on the crankshaft pulley.
- Loosen lock nut for adjusting screw; insert feeler gauge between rocker arm and valve cap.
- Adjust valve clearance by turning adjusting screw; hold screw and tighten lock nut.
- Turn crankshaft 180° and adjust remaining cylinders in firing order.
Compression pressure measurement diagnostic
⚠ 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
- Check crankcase oil level is correct and air cleaner, starter and battery are normal.
- Bring engine to normal operating temperature.
- Move control lever to a position for shutting off fuel supply.
- Remove all glow plugs; install compression gauge and adaptor (ST332270) to the cylinder to be measured.
- Turn engine with starter and read gauge pressure at the instant the gauge pointer stops.
- If reading is below the limit, overhaul the engine.
Fuel system priming maintenance
⚠ Turn valve lever to OPEN position before loosening any air vent screw.
- Move fuel filter valve lever to AIR position (filter with [AIR] valve).
- Move lever to ON position when fuel flows free of bubbles from the overflow pipe.
- Loosen air vent screw of the injection pump to prime fuel pipe and injection pump.
- Injection pipes and nozzles can be primed by cranking the engine.
Oil and oil filter change maintenance
⚠ Do not cause damage to the O-ring when installing the filter.
Tools: filter wrench
- Warm up engine; remove drain plug and drain oil into a container.
- Remove used filter with a filter wrench; remove old O-ring from filter base and clean base.
- Check new filter O-ring is in groove; apply thin coat of lube oil to O-ring.
- Install new filter by hand until O-ring touches base; tighten 3/4 to 1 turn more.
- Install drain plug and tighten to specified torque.
- Refill engine to H mark on dipstick; approximately 0.5 l extra required for filter and lines.
- Start engine, idle a few minutes and check for leaks; re-tighten filter if leaking.
- Stop engine, check oil level and add oil if necessary.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| 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.
Common questions
What size generator is the Mitsubishi S3L2?
The Mitsubishi S3L2 is rated 10.8 kW standby (11.7 kVA).
What engine does the Mitsubishi S3L2 use?
The Mitsubishi S3L2 is powered by the Mitsubishi S3L2 engine.
What kind of fuel does the Mitsubishi S3L2 run on?
The Mitsubishi S3L2 runs on Diesel fuel (ASTM No. 2-D).
What's the oil capacity on a Mitsubishi S3L2?
The Mitsubishi S3L2 engine in the Mitsubishi S3L2 has an oil capacity of 0.34 liters.
What is the prime power rating of the Mitsubishi S3L2?
The Mitsubishi S3L2 is rated 9.7 kW prime, against 10.8 kW standby.
How much does the Mitsubishi S3L2 weigh?
The Mitsubishi S3L2 has a dry weight of 135 kg (297 lb).
What voltage does the Mitsubishi S3L2 produce?
The Mitsubishi S3L2 is offered in 12 V, 50 V.
Repair guides
6- Compression pressure measurement
- Fuel injection timing inspection and adjustment
- Fuel system priming
- Idle RPM setting
- Oil and oil filter change
- Valve clearance adjustment
Step-by-step procedures compiled from the Mitsubishi service manual for this model.
Parts
21| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 008816-4C | Glow plug (sheathed type, rated voltage 10.5 V, current draw 9.7 ± 1.0 A) | Glow plug | eBay | |
| 30890-05200 | Starter switch | Starter | eBay | |
| 30A60-00200 | Fuel pump (electric diaphragm, remote; 300 cc/min minimum or 400 cc/min minimum at DC 12 V and 20°C) | Pump | eBay $25.00 FridayParts $33.50 KuduParts $36.00 | |
| 31A90-00100 | Oil pressure switch | Sensor | eBay | |
| 32A66-19100 | Starter relay | Starter | eBay | |
| A7T02071C | Alternator (AC generator, IC regulator, 12 - 50 A) | Alternator | Amazon eBay $200.00 | |
| DN15PD6 | Fuel injection nozzle (throttle type) | Injector | eBay $25.00 | |
| M1T68281 | Starter (DC solenoid shifted with reduction gear, 12 - 1.7 kW) | Starter | eBay $211.25 | |
| MC880-900 | Thermoswitch (ETR) | Sensor | eBay eBay | |
| MM130-066 | Pressure switch (ETR) | Sensor | eBay | |
| MM431-28201 | Glow plug relay (DC 12 V, continuous rating 1 minute, coil resistance 13 Ω) | Glow plug | eBay $10.88 eBay $23.99 FridayParts $14.20 | |
| MM432-104 | Thermoswitch (ETS) | Sensor | eBay $9.99 eBay $10.90 FridayParts $14.99 | |
| 05125-00102 | Battery switch | Service part / kit | eBay | |
| 31A66-06100 | Controller (ETR stop solenoid system) | Service part / kit | eBay | |
| ALR190-I03 | ALR Series Linear Actuator | -12 or -24 | Service part / kit | Amazon eBay FridayParts $597.74 |
| ALR190-M04 | ALR Series Linear Actuator | -12 or -24 | Service part / kit | Amazon eBay |
| I6A11-14000 | Control timer unit (ETS), input voltage range DC 9 to 15 V | Service part / kit | eBay | |
| I6A12-02001 | Control timer unit (ETR) | Service part / kit | eBay | |
| MM130-767 | Safety relay | Service part / kit | eBay FridayParts $69.99 | |
| MM431-762 | Glow timer (quick heating, DC 12 V, pre-glow time 6.2 ± 0.7 seconds) | Service part / kit | eBay $19.75 eBay FridayParts $18.99 | |
| MM434-062 | Diode | Service part / kit | eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Spec sheet — Spec Sheet BMGS010LSP5 (Mitsubishi)Spec sheet — mhi small engine gen drive (Mitsubishi)Service manual — Mitsubishi SL series ServiceManual (Mitsubishi)
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.