HomeGeneracGenerac MLG 15

Generac MLG 15 Generator Set

The Generac MLG 15 is a 14 kW (14 kVA) diesel standby generator set powered by a Mitsubishi S4L2-Y461ML engine. It is available at 120 V and 240 V, single-phase, 60 Hz and rated 54 A. It holds about 6 L (1.6 gal) of oil and 11 L (2.9 gal) of coolant, with a maximum ambient rating of 48.89 °C. Starting uses battery rated 440 CCA. The set measures 2667×1727×1422 mm (105.0×68.0×56.0 in), weighs about 646 kg (1424 lb) and produces 70 dBA at 7.01 m. An integrated tank holds 211.98 L (56.0 gal), roughly 43 hours of runtime. The same S4L2-Y461ML engine also powers generator sets from Clifford and Magnum.

14 kW
Standby
1.8 L
Displacement
6.0 L
Oil capacity
1
Document types

How to read your Generac serial & model number →

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power14 kW
Standby kVA14
Prime power13 kW
EmissionsInterim Tier IV
Oil capacity6.0 L
AlternatorMarathon 333CSA3024 (Class H insulation)
Voltage options120 V, 240 V
Phasesingle
Rated current54 A
Circuit breaker70 A
Battery cranking440 CCA
Max ambient48.89 °C
Dimensions (L×W×H)2667×1727×1422 mm
Dry weight646 kg
Sound level70.0 dBA @ 7.01 m
Fuel tank211.98 L
Tank runtime43 hr

Engine

Mitsubishi S4L2-Y461ML
Oil capacity6.3 L
Coolant capacity11.0 L
Displacement1.8 L
Aspirationnatural
Rated speed1800 rpm

Maintenance & consumables

for the Mitsubishi S4L2-Y461ML
ItemSpecCapacityPart #Interval
Air filter find
Fuel filter find
Oil filterFull flow oil filter, spin on type30A4000103 PartsGeek FridayParts $13.99
Belt find
Coolant13.51
Coolant filter find
Oil6.0

Compatible filters for the Mitsubishi S4L2-Y461ML — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.

  • Air filter: Mitsubishi MD623028 Mitsubishi 91B6100800 Donaldson P821575 Donaldson P822858
  • Fuel filter: Donaldson P550345 Ac Delco XD32

Common questions

What is the power rating of the Generac MLG 15?

The Generac MLG 15 is rated 14 kW standby (14.0 kVA).

What engine does the Generac MLG 15 use?

The Generac MLG 15 is powered by the Mitsubishi S4L2-Y461ML engine.

What fuel does the Generac MLG 15 use?

The Generac MLG 15 runs on diesel.

What is the oil capacity of the Generac MLG 15?

The Mitsubishi S4L2-Y461ML engine in the Generac MLG 15 has an oil capacity of 6.3 liters.

What alternator does the Generac MLG 15 use?

The Generac MLG 15 uses a Marathon 333CSA3024 alternator. Insulation class H.

Troubleshooting

2

Symptoms & remedies

SymptomCauseRemedy
Low Oil Pressure ShutdownLow oil level, Oil leaking from engine, Oil pressure senderCheck oil level on dipstick. Add oil if needed. Visually inspect the engine for leaks. Restart unit and verify loss of pressure. Shut down immediately if pressure does not reach 5 psi (34 kPa) within five seconds. See engine operator’s manual to identify corrective action.
High Coolant Temperature ShutdownLow coolant level, Blockage in radiator, Leakage in coolant hoses, engine block, or water pumpAdd coolant if needed. Allow engine to cool, then check coolant level in radiator. Check radiator shroud and ducting for blockage and remove any foreign matter. Inspect for visible leaks. Check tension of water pump serpentine drive belt. Remove load on generator and restart engine. Check coolant temperature and shut engine down immediately if it starts to overheat (230 degrees or higher). See the engine operator’s manual for additional information on engine overheating.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

7
Part #DescriptionQtySystem
009708Unit ID tag, Vehicle Identification Number (VIN) tagUnit id tag PartsGeek
010005Air filter, Control box, Radiator, Document holder, Coolant overflow jug, Battery (behind panel), Starter (below muffler—on engine), Oil level indicator (dipstick), Muffler, Fuel filterAir filter PartsGeek
010053Warning: Hot surface, moving partsWarning label PartsGeek
010054Operator’s manual must be stored on machineOperator manual PartsGeek
010056Main circuit breaker, Engine ignition switch (key activated), Circuit breaker indicator light, Engine hours meterMain circuit breaker PartsGeek
0100521Service part / kit PartsGeek
10000006179Clifford POWER SERVICE LEVEL CHECKSService part / kit PartsGeek

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.

Fuel consumption

RatingLoadL/hgal/h
Prime4.921.3
Prime50%2.460.65
Prime75%3.710.98
Prime100%4.921.3
Standby

Available documents

Owner's manual — 10289 (Generac)Owner's manual — A0000381158 (Generac)

Other sets with this engine