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Mitsubishi S4L2 Engine

The Mitsubishi S4L2 is a 1.76 L 4-cylinder natural engine rated at 1 rpm. It powers generator sets from Generac, Mitsubishi and Pt. Berkat Manunggal Jaya, including the MLT4150MV, MTT15 and BMGS.013LSP5. It holds 8 L (2.1 gal) of oil and 11 L (2.9 gal) of coolant.

Also known as: Mitsubishi S4L2

Part of the Mitsubishi S4L2 engine family — 7 variants share parts & fitment.

1.76 L

Displacement

Cylinders

1 rpm

Rated speed

8.0 L

Oil capacity

On this pageService parts Specs Generator sets Maintenance Filter cross-reference FAQ Service intervals Torque & specs Fluids Procedures Wiring

Service parts for the S4L2

The cheapest captured merchant offer per filter — see the full cross-reference below for every OEM/aftermarket option.

Air intake

1 required

P772579Air filterfind

Oil system

1 required

0A45310244Oil filter$9.09NAPA

Prices captured from merchant listings; some links are affiliate links. Verify against your serial number before ordering.

Engine specifications

Oil capacity	8.0 L
Coolant capacity	11.0 L
Displacement	1.76 L
Cylinders	4
Aspiration	Natural
Rated speed	1 rpm

Generator sets powered by this engine

Shared across brands: Generac, Mitsubishi, Pt. Berkat Manunggal Jaya

Generac MLT4150MV Generac MTT15 Mitsubishi S4L2 Pt. Berkat Manunggal Jaya BMGS.013LSP5

How to read your Mitsubishi engine serial & model number →

Common problems

Mast Lights ON but light output low
Cause: Fixture and/or lens is dirty
Fix: Clean components: • Reflective surface of light fixture • Inside and outside surface of glass lens IMPORTANT NOTE: Clean components only with mild soap and water. Other chemicals may damage surfaces and glass.
Low transformer output
Fix: Perform capacitor check to determine if the capacitor or coil needs to be replaced.
Generator output incorrect
Cause: Incoming voltage to the ballast is incorrect, Engine speed may need to be adjusted.
Fix: Check the incoming voltage to the ballast by checking the available voltage on the GFCI receptacle. Incoming voltage should be 120V +/-5V.
Unit cranks but does not start
Cause: Fuel level low, Verify fuel pump operation.
Fix: Check fuel level in tank. Inspect air filter for blockage.
Transformer output low
Fix: Verify voltage from transformer: When a bulb strikes (induces an arc), transformer voltage should be approximately 400 VAC. Next, voltage should drop, slowly rise, then stabilize at 240–260 VAC. On hard-wired models, remove mast junction box cover and insert wire probes into the connector blocks of the light and ground. If correct voltage is not achieved, check the capacitor to determine if capacitor or coil must be replaced.
Restricted air filter
Fix: Refer to OEM engine operator’s manual for additional information.
Oil pressure switch failure
Fix: Refer to OEM engine operator’s manual to identify corrective action.
Oil leaking from engine
Cause: Visually inspect the engine for leaks.
Mast lights ON but light output is low
Cause: Fixture and/or lens is dirty, Lamp worn due to normal use.
Fix: Clean reflective surface inside fixture and both inside and outside surface of glass lens. Replace lamp.
Mast lights off, checking outside control box
Cause: Light fixture too hot
Fix: Allow light fixture to cool 10–15 minutes before restarting.
Mast lights off, checking inside control box
Cause: Lighting connections loose
Fix: Check connections inside control box.
Mast Lights OFF but ballast indicators on control panel ON
Cause: Light fixture too hot
Fix: Allow light fixture to cool 10-15 minutes before restarting.
Mast lights OFF but ballast Indicators ON
Cause: Light fixture is too hot, Faulty lamp connection.
Fix: Allow light to cool 10-15 minutes before restarting. Check that the lamp is tight in the socket.
Mast Lights OFF and ballast indicators on control panel OFF
Cause: Lighting connections loose
Fix: Check wire connections: • Inside control box • Inside each ballast box
Mast lights OFF and ballast indicators OFF
Cause: Loose lighting connections
Fix: Check connections inside control box and inside each ballast box.

Compiled from service & troubleshooting documentation across every generator set that uses the Mitsubishi S4L2.

Maintenance schedule

Item	Spec	Part #	Interval
Air filter		—
Fuel filter	FA-1D Lockable Flame Arrestor Fuel Cap	300585		Amazon eBay
Oil filter		0A45310244	1000 hr	Amazon eBay $24.99 NAPA $9.09
Battery	Clean Battery	—	250 hr
Belt	Check Fan Belt Tension (Replace If Necessary)	—	1000 hr
Coolant	Drain and clean fuel tank Inspect radiator fins for debris, clean as required	—	250 hr
Oil	Change the engine oil and oil filter after the initial 50 hours of operation, then at the appropriate interval thereafter.	—	250 hr
Spark plug	Check glow plugs Inspect Engine Starting Conditions And Noise Conditions Check Exhaust Smoke Condition	—	1000 hr

Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.

Repair guides

Step-by-step procedures compiled from the Mitsubishi service manual for this engine.

Service intervals

Item	Action	Hours	Months	Notes
Electrical connections	Check	8 hr		Daily or before use
Oil level	Check	8 hr		Daily or before use
Tire pressure	Check	8 hr		Daily or before use
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
Engine bolts and nuts	Adjust	50 hr		First service — Initial 50 hours
Engine oil and oil filter	Change	50 hr		First service — Change after the initial 50 hours of operation, then at the appropriate regularly scheduled interval thereafter
Engine oil and oil filter	Replace	50 hr		First service — Initial 50 hours, then yearly or 100 hours
Fuel tank and water separator	Drain	50 hr		Drain water and sediment
Nuts and bolts	Other	1000 hr		First service — Retighten
Replace engine oil and oil filter	Change	50 hr		First service — Mitsubishi engine, after initial 50 hours, then at regular interval thereafter
Fuel filter element	Clean	100 hr		After cleaning, prime
Radiator fins	Clean	100 hr
Air cleaner	Check	250 hr		Inspect
Engine oil	Change	250 hr	12 mo	First service — Or once a year (whatever comes first)
Fuel filter	Replace	250 hr
Oil filter	Change	250 hr	12 mo	First service — Or once a year (whatever comes first)
Belt and belt tension	Inspect	400 hr		Inspect and adjust
Fuel tank	Drain	400 hr		Drain water from fuel tank
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		Diesel engines
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
Leveling jacks	Lubricate	750 hr
Alternator	Check	1000 hr
Starter	Check	1000 hr
Turbocharger	Check	1000 hr		See turbocharger manual
Air cleaner element	Replace		12 mo	Replace yearly, or after six cleanings, whichever occurs first (Mitsubishi engine guide)
Coolant	Change		24 mo	Every 2 Years
Jack Maintenance (lubricate gearing/handle)	Lubricate		12 mo	Perform at least annually
Replace air cleaner element	Replace		12 mo	Kubota engine: yearly, or after six cleanings, whichever occurs first
Trailer Wheel Bearings Lubrication	Lubricate		12 mo	Minimum every 12 months or 12,000 miles (19,312 km)
Trailer wheel bearings	Lubricate		12 mo	Minimum recommended lubrication is every 12 months or 12,000 miles (19,312 km)
Wheel lug nuts	Check			First service — Tighten to factory specifications after first 50 miles
Winch brake assembly	Clean		6 mo	Clean and grease brake assembly per winch preventive maintenance schedule (semi-annually)

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

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	Air pressure for cabinet cleaning	40	PSI (276 kPa) max
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	Engine oil pressure, normal operating	35-80	psi (241-552 kPa)	engine running
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	Engine coolant temperature, normal operating	100-230	°F (38-110°C)	engine running
Temperature	High Coolant Temperature Shutdown Threshold	210	°F	99°C
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]

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
Coolant	50% glycol, 50% water		below 49°C		Standard mixture; 60/40 and heated options available for cold weather
Coolant	50% glycol, 50% water or 60% glycol, 40% water		below 49°C		Liquid cooled engines with standard 50/50 mixture or optional cold-weather 60/40 configuration
Coolant	50/50 glycol/water or 60/40		below 49°C		Liquid cooled diesel engines
Coolant	40% water / 60% antifreeze		above -36°C		Freezing point -34°F (-36°C); maximum freeze protection is 60% antifreeze
Coolant	50% water / 50% antifreeze		above -24°C		Freezing point -12°F (-24°C); mix demineralized/distilled water with coolant, not hard water
Engine oil	SAE 0W-20 Synthetic		below -18°C		For use below -0°F / -18°C
Engine oil	SAE 10W				From engine oil viscosity chart decal
Engine oil	SAE 15W-40				From engine oil viscosity chart decal
Engine oil	SAE 30W				From engine oil viscosity chart decal
Engine oil	SAE 40W				From engine oil viscosity chart decal
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)
Fuel	No. 2D diesel (above freezing) / No. 1D diesel (at or below freezing); climatized 1D/2D mix also usable in some areas	Ultra-low-sulfur diesel only			Do NOT use home heating oil or bio-diesel fuel
Fuel	Ultra-low-sulfur diesel No. 1D or No. 2D				No. 1D when at or below freezing; No. 2D when above freezing; climatized fuel acceptable
Fuel	Ultra-low-sulfur diesel; No. 1D below freezing, No. 2D above freezing (climatized 1D/2D blend acceptable in some areas)			216.0 L	DO NOT use home heating oil or bio-diesel fuel
Grease	High quality grease made specifically for wheel bearing lubrication				Trailer wheel bearing lubrication, minimum every 12 months or 12,000 miles (19,312 km)

Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.

Procedures

Fan 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.

Light Tower Setup installation

⚠ Verify area above unit is clear of overhead wires before raising the mast

Position unit at ground level or higher than the area to be illuminated
Place unit on firm, relatively flat ground (less than 5° slope) and block wheels
Rotate the tongue jack 90° and raise the trailer tongue off the towing vehicle
Use the grounding stud on the frame per NEC and local regulations
Pull outrigger locking pins and extend outriggers until pins snap into place
Rotate rear jack 90° and lower it, then level the trailer with all four jacks
Adjust lamp aim by loosening trunnion wing nuts, then tighten hardware

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.

Jack Maintenance maintenance

Apply automotive grease to internal gearing via jack cover or grease fitting near crank (side-wind models)
Rotate jack handle to distribute grease evenly
Apply lightweight oil to handle unit at both sides of tube (side-wind models)
Lubricate caster wheel axle bolt/nut assembly with lightweight oil if equipped
Apply lightweight oil to screw stem (top-wind models)

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.

RPM Quick Drain maintenance

Tools: RPM Quick Drain system hardware

Convenient - no need to reach under machines
Purges and extracts from the sump
Evacuates sump directly to final containment via zero leak quick disconnect
No spills, dripping filters, drain pans or intermediate containers needed
Completes engine oil and filter change in less than 10 minutes

Trailer Wheel Bearing Lubrication maintenance

Tools: Grease gun

Remove small rubber plug on grease cap
Attach standard grease gun fitting to grease zerk fitting
Pump grease until new grease is visible around gun nozzle
Wipe excess grease from hub with clean cloth
Replace rubber plug

Winch Preventive Maintenance maintenance

⚠ Replace cable immediately if damaged

⚠ Replace brake if slippage detected

Check winch is free of dirt, oil, grease, water, and foreign substances
Ensure all mounting bolts tightened to recommended torque values
Check connections are securely tightened and free of corrosion
Inspect cable for damage: cuts, knots, crushed or frayed portions, broken strands
Check brake for slippage or drift by visual inspection when winch is under load

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

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.

Parts cataloged across the Mitsubishi S4L2 family

Part #	Description	Category
042418	Dinse-Style Connector Kit Accepts #4 to #1/0 AWG cable. Kit includes one male Dinse-style plug which attaches to the work and/or weld cables and plugs into the Dinse-style receptacles on the power source.	Cable connector
191981	Tweco®-Style Connector Accepts #1/0 to #2/0 AWG cable. Kit includes one male Tweco-style plug which attaches to the work and/or weld cables and plugs into the Tweco-style receptacles on the power source.	Cable connector
210061	Tweco®/Dinse Adapter One-piece adapter with a male Tweco-style plug (to power source) on one end and a female Dinse-style receptacle (for weld cable connection) on other end.	Cable connector
301611	Universal Connector Kits Tweco®-style receptacles 301595 Dinse-style receptacles Includes receptacles, wrench and electrical joint compound.	Cable connector
043947	FA-1D Lockable Flame Arrestor Fuel Cap Fuel cap can be padlocked to prevent vandalism. A built-in flame arrestor prevents flames or sparks from entering the fuel tank.	Fa 1d lockable flame arrestor fuel cap fuel cap can be padlocked to prevent vandalism a built in flame arrestor prevents flames or sparks from entering the fuel tank
300585	FA-1D Lockable Flame Arrestor Fuel Cap	Fuel filter
252782	Engine Filter Kit Includes all filters required for proper engine maintenance. Oil filter, primary and secondary fuel filter, and primary air filter.	Oil filter
042419	SCREW RHM 10-32 X 4	Service part / kit
119172	1-phase, 120/240 V, 50 A plug (NEMA 14-50P) to fit full KVA receptacle.	Service part / kit
151086	RCC-14 Remote Contactor and Current Control	Service part / kit
194744	RFCS-14 HD Foot Control* Heavy-duty foot current control. Includes 20-foot (6 m) cord and 14-pin plug.	Service part / kit
195301	Blue water-resistant cover with Miller logo resists stains and mildew, and protects the finish of your welder.	Service part / kit
209649	Form: SFC626B	Service part / kit
242211020	RHC-14 Hand Control	Service part / kit
301582	Wireless Remote Hand Control - Wireless antenna kit 300749 recommended	Service part / kit
907529	Spectrum® 375 X-TREME™ See literature PC/9.2	Plasma cutter
907579	Spectrum® 625 X-TREME™ with 12-foot (3.7 m) torch See literature PC/9.6	Plasma cutter
907579001	Spectrum® 625 X-TREME™ with 20-foot (6.1 m) torch See literature PC/9.6	Plasma cutter
043688	RCCS-14 North/south fingertip control	Remote control
195511	PRHC-14 Hand Control* Complete current control brings 120 volts of GFCI power to work area in a single cord. Housed in a durable and light aluminum case and includes 125-foot (38 m) cord with plugs.	Remote control
301580	Wireless Remote Foot Control* For remote current control. Receiver plugs directly into the 14-pin receptacle of Miller machine. 90-foot (27.4 m) operating range. Wireless antenna kit 300749 is recommended.	Remote control
195196	No. 2 Stick Cable Set, 15 ft. (4.6 m) Consists of 15-foot (4.6 m) No. 2 electrode cable with holder, and 15-foot (4.6 m) work cable with clamp. 200 A, 100% duty cycle.	Stick cable
300836	No. 2 Stick Cable Set, 50 ft. (15 m) Consists of 50-foot (15 m) No. 2 electrode cable with holder, and 50-foot (15 m) work cable with clamp. 200 A, 100% duty cycle.	Stick cable
043952	2/0 Stick Cable Set, 100/50 ft. (30.5/15 m) Consists of 100-foot (30.5 m) 2/0 electrode cable with holder, and 50-foot (15 m) work cable with clamp. 300 A, 100% duty cycle.	Stick cable set
173851	2/0 Stick Cable Set, 50 ft. (15 m) Consists of 50-foot (15 m) 2/0 electrode cable with holder, and 50-foot (15 m) work cable with clamp. 350 A, 100% duty cycle.	Stick cable set

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

MM409303 FridayParts $44.60 MM433424 KuduParts $31.30 FridayParts $44.60 SinoCMP $119.00 565004093020 KuduParts $33.20 FridayParts $44.63 MM409302 FridayParts $44.65 MM439303 FridayParts $44.65 MM435190 KuduParts $10.00 FridayParts $12.50 MM432104 FridayParts $14.99 015PLUS FridayParts $14.99 MM43128202 FridayParts $14.20 MM43128201 FridayParts $14.20 MM436811 FridayParts $18.99 MM431762 FridayParts $18.99 30A8710044 KuduParts $34.00 FridayParts $36.45 K6516441 FridayParts $23.63 31A46-11200 FridayParts $23.63 MD001370 FridayParts $23.63 MM409510 SinoCMP $42.00 FridayParts $46.20 4Pcs FridayParts $7.88 SinoCMP $25.90 32A66-03102 FridayParts $34.00 MM435-94101 FridayParts $56.99 30A87-20403 FridayParts $36.50 30A87-10090 FridayParts $36.50 MM433921 FridayParts $78.20 6649048 FridayParts $199.85 451189 FridayParts $462.50 31A4705020 FridayParts $462.50 30A4800401 FridayParts $65.00 14528387 FridayParts $64.99 7412921 KuduParts $13.00 FridayParts $14.90 11802804 FridayParts $64.99 11801160 FridayParts $64.99 MD372536 FridayParts $12.50 MD153103 FridayParts $12.50 MD133317 FridayParts $12.50 ME408992 KuduParts $20.00 FridayParts $21.99 31A05-00203 FridayParts $275.90 195-8343 FridayParts $475.90 TD03 FridayParts $199.80 SinoCMP $279.00 49131-02510 FridayParts $289.59 31A07-02300 FridayParts $28.99 +0.5mm FridayParts $27.25 MA-MM43594101 FridayParts $68.99 31A60-01100 FridayParts $43.99 MM435181 FridayParts $485.20 31A47-04030 FridayParts $485.20 A036-3175 FridayParts $63.99 M040142L FridayParts $63.99 MM409301 FridayParts $65.89 MM407405 FridayParts $65.89 31A17-07100 FridayParts $50.99 31A17-09301 FridayParts $50.99 199-2334 FridayParts $169.59 158-4795 KuduParts $216.00 FridayParts $225.99 163-9997 KuduParts $216.00 FridayParts $225.99 199-2356 FridayParts $48.50 237-3530 FridayParts $19.90 31A04-00700 FridayParts $77.59 3-Year FridayParts $11.99 199-2358 FridayParts $229.99 217-1643 FridayParts $59.99

Parts 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: Donaldson P772579 Donaldson P775300 Wix 46652 Baldwin PA1608 Wix 46672 Baldwin RS3543
Oil filter: Generac 0A45310244 Mitsubishi 30A4000103 Donaldson P502007 Wix 51356 Ac Delco AC028 Baldwin B1402

Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.

Also used in

Caterpillar 303.5 — Excavator Tracked
Massey Ferguson MF2415 — Tractor
Terex HR14 — Excavator Compact
Terex HR16 — Excavator Compact
Volvo Construction Equipment EC35 — Excavator Tracked

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 S4L2?

The Mitsubishi S4L2 engine has an oil capacity of 8.0 liters.

What is the displacement of the Mitsubishi S4L2?

The Mitsubishi S4L2 has a displacement of 1.76 liters with 4 cylinders.

Which generators use the Mitsubishi S4L2 engine?

The Mitsubishi S4L2 powers 4 generator set(s), including Generac MLT4150MV, Generac MTT15, Mitsubishi S4L2, Pt. Berkat Manunggal Jaya BMGS.013LSP5.

What oil filter does the Mitsubishi S4L2 use?

The Mitsubishi S4L2 uses oil filter part numbers Generac 0A45310244, Mitsubishi 30A4000103, Donaldson P502007.

What air filter does the Mitsubishi S4L2 use?

The Mitsubishi S4L2 uses air filter part numbers Donaldson P772579, Donaldson P775300, Wix 46652.

How often should you change the oil in the Mitsubishi S4L2?

The Mitsubishi S4L2 oil change interval is every 250 hours.

What is a common problem with the Mitsubishi S4L2 engine?

A commonly reported issue on generators using the Mitsubishi S4L2 is: Mast Lights ON but light output low. Cause: Fixture and/or lens is dirty. Fix: Clean components: • Reflective surface of light fixture • Inside and outside surface of glass lens IMPORTANT NOTE: Clean components only with mild soap and water. Other chemicals may damage surfaces and glass..