Home›Engines›Mitsubishi S4L2

Mitsubishi S4L2 Engine

Name: Mitsubishi S4L2 Engine
Brand: Mitsubishi

The Mitsubishi S4L2 is a 1.76 L 4-cylinder natural engine rated at 1 rpm. It powers generator sets from Generac and Pt. Berkat Manunggal Jaya, including the MLT4150MV 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

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$12.99Amazon

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, Pt. Berkat Manunggal Jaya

Generac MLT4150MV Pt. Berkat Manunggal Jaya BMGS.013LSP5

How to read your Mitsubishi engine serial & model number →

Common problems

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 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.
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.
Low transformer output
Fix: Perform capacitor check to determine if the capacitor or coil needs to be replaced.
Low oil pressure shutdown
Cause: Low oil level
Fix: Verify oil level on dipstick. Add oil, if needed.

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 $12.99 eBay $24.99
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.

Service intervals

Item	Action	Hours	Months	Notes
Coolant level	Check	8 hr		Daily or before use
Electrical connections	Check	8 hr		Daily or before use
Fuel level	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
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
Replace engine oil and oil filter	Change	50 hr		First service — Mitsubishi engine, after initial 50 hours, then at regular interval thereafter
Air cleaner	Check	250 hr		Inspect
Fuel filter	Replace	250 hr
Belt and belt tension	Inspect	400 hr		Inspect and adjust
Fuel tank	Drain	400 hr		Drain water from fuel tank
Glow plugs	Check	500 hr		Diesel engines
Leveling jacks	Lubricate	750 hr
Air cleaner element	Replace		12 mo	Replace yearly, or after six cleanings, whichever occurs first (Mitsubishi engine guide)
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
Pressure	Air pressure for cabinet cleaning	40	PSI (276 kPa) max
Pressure	Engine oil pressure, normal operating	35-80	psi (241-552 kPa)	engine running
Temperature	Engine coolant temperature, normal operating	100-230	°F (38-110°C)	engine running
Temperature	High Coolant Temperature Shutdown Threshold	210	°F	99°C
Torque	Wheel lug nuts - first pass	20-25	ft-lb (27-33 Nm)	star pattern
Torque	Wheel lug nuts - second pass	50-60	ft-lb (67-81 Nm)	star pattern
Torque	Wheel lug nuts - third pass	90-120	ft-lb (122-162 Nm)	star pattern
Torque	Wheel lug nuts, first pass	20-25	ft-lb (27-33 Nm)	first pass
Torque	Wheel lug nuts, second pass	50-60	ft-lb (67-81 Nm)	second pass
Torque	Wheel lug nuts, third pass	90-120	ft-lb (122-162 Nm)	third pass
Voltage	Engine/DC battery voltage (VBAT)	13.5-15	V	12-volt system, engine running
Voltage	GFCI Outlet / Ballast Supply Voltage	120 ±5	V
Voltage	Transformer Stabilized Voltage	240-260	VAC	after strike, drops then rises and stabilizes
Voltage	Transformer Strike Voltage	approximately 400	VAC	when bulb strikes/induces an arc

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
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

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

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)

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

Lifting the Unit operation

Verify lifting equipment has sufficient capacity for unit weight
Close and lock all hoods and doors and stow the lights
Verify the cradle locking pin is in place
Attach slings, chains or hooks directly to the central lifting eye
Use upper or lower forklift pockets with care, approaching perpendicular to the unit

Raising the Mast operation

⚠ Do not extend mast beyond the colored mark on the second mast section

Set up and level the unit
Check mast cables for wear or damage and verify centering in pulleys
Press and hold the winch control toggle switch upward to extend mast to desired height
Rotate the mast using the rotation knob at the base until lights face desired direction

Shutting Down the Unit operation

Remove all loads from the outlets
Switch individual light circuit breakers OFF
Switch the main circuit breaker OFF
Move the control power switch to STOP

Shutting Down the Unit - Standard Controls operation

Remove all loads from the outlets
Switch individual circuit breakers for each light OFF (O)
Switch the main circuit breaker OFF (O)
Move the control power switch to STOP

Starting the Engine - Analog Controls operation

⚠ Do not continuously crank engine for more than ten seconds

⚠ Never start the engine with circuit breakers switched on

Verify main circuit breaker and individual light breakers are OFF (O)
Turn key to GLOW PLUG position, hold 10-15 seconds until glow plug indicator turns red
Turn key to START position, hold until engine cranks and starts
Release key; it moves to RUN position
Allow engine to reach normal operating temperature before switching on loads

Starting the Unit operation

⚠ Do not continuously crank engine for more than ten seconds

Verify main circuit breaker and individual light breakers are OFF
Turn key to GLOW PLUG position and hold five seconds or until indicator turns red
Turn key to START position and hold until engine cranks and starts
Release the key; it moves to RUN position
Allow engine to reach normal operating temperature before switching on loads

Towing the Unit operation

⚠ Maximum recommended highway towing speed is 45 mph (72 km/h)

Raise the rear jack and outrigger jacks fully into travel position
Use the tongue jack to couple the trailer to the towing vehicle hitch and attach safety chains
Lubricate the leveling jack grease fittings
Connect trailer wiring and check directional/brake lights
Verify mast cradle locking pin is secure and doors/enclosure are latched
Check tire inflation and tighten wheel lugs in sequence per torque specification

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	other_service
119172	1-phase, 120/240 V, 50 A plug (NEMA 14-50P) to fit full KVA receptacle.	other_service
151086	RCC-14 Remote Contactor and Current Control	other_service
195301	Blue water-resistant cover with Miller logo resists stains and mildew, and protects the finish of your welder.	other_service
209649	Form: SFC626B	other_service
242211020	RHC-14 Hand Control	other_service
301582	Wireless Remote Hand Control - Wireless antenna kit 300749 recommended	other_service
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 Remote Current Control* North/south rotary-motion fingertip control attaches to TIG torch using two hook-and-loop fasteners. Includes 26.5-foot (8 m) cord and 14-pin plug.	remote_control
194744	RFCS-14 HD Foot Control* Heavy-duty foot current control. Includes 20-foot (6 m) cord and 14-pin plug.	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 565004093020 KuduParts $33.20 MM409302 FridayParts $44.65 MM439303 FridayParts $44.65 MM435190 KuduParts $10.00 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 K6516441 FridayParts $23.63 31A46-11200 FridayParts $23.63 MD001370 FridayParts $23.63 MM409510 SinoCMP $42.00 4Pcs FridayParts $7.88 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 11802804 FridayParts $64.99 11801160 FridayParts $64.99 MD372536 FridayParts $12.50 MD153103 FridayParts $12.50 MD133317 FridayParts $12.50 ME408992 KuduParts $20.00 31A05-00203 FridayParts $275.90 195-8343 FridayParts $475.90 TD03 FridayParts $199.80 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 $216.00 163-9997 KuduParts $216.00 199-2356 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 Wix 46672
Oil filter: Generac 0A45310244 Mitsubishi 30A4000103 Donaldson P502007 Wix 51356 Ac Delco AC028

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 2 generator set(s), including Generac MLT4150MV, 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: 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..