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Generac MLT5080 Generator Set

The Generac MLT5080 is a 8 kW (8 kVA) standby generator set powered by a Mitsubishi L3E engine. It is available at 120/240 V, single-phase, 60 Hz and rated 66 A. It holds about 5 L (1.3 gal) of oil and 4.3 L (1.1 gal) of coolant. Starting uses 1 group-24 battery rated 440 CCA at 12 V. The set measures 170×72×30000 mm (6.7×2.8×1181.1 in), weighs about 963 kg (2123 lb) and produces 70 dBA. An integrated tank holds 216 L (57.1 gal).

8 kW
Standby
0.95 L
Displacement
5.0 L
Oil capacity
1
Document types

How to read your Generac serial & model number →

Specifications

Frequency60.0 Hz
Standby power8 kW
Standby kVA8
Emissions4 Final
Oil capacity5.0 L
AlternatorMarathon 201CSA5420
Voltage options120/240 V
Phase1
Rated current[66, 66, 88] A
Circuit breaker[40, 40, 53] A
Battery group24
Battery cranking440 CCA
Battery voltage12 V
Battery quantity1
Dimensions (L×W×H)170×72×30000 mm
Dry weight963 kg
Sound level70.0 dBA
Fuel tank216.0 L

Engine

Mitsubishi L3E
Oil capacity5.0 L
Coolant capacity4.3 L
Displacement0.95 L
AspirationNatural
Rated speed1800 rpm

Maintenance & consumables

for the Mitsubishi L3E
ItemSpecCapacityPart #Interval
Air filterDry cartridge750 hr
Fuel filter1000 hr
Oil filterFull flow, spin-on type1000 hr
Battery500 hr
Belt1000 hr
Coolant4.3 qt250 hr
Oil5.2 L1000 hr
Spark plug1000 hr

Common questions

What is the power rating of the Generac MLT5080?

The Generac MLT5080 is rated 8 kW standby (8.0 kVA).

Which engine powers the Generac MLT5080?

The Generac MLT5080 is powered by the Mitsubishi L3E engine.

How much oil does the Generac MLT5080 take?

The Mitsubishi L3E engine in the Generac MLT5080 has an oil capacity of 5.0 liters.

What alternator does the Generac MLT5080 use?

The Generac MLT5080 uses a Marathon 201CSA5420 alternator.

Troubleshooting

6

Symptoms & remedies

SymptomCauseRemedy
Low oil pressure shutdownLow oil levelVerify oil level on dipstick. Add oil, if needed.
Oil leaking from engineVisually inspect the engine for leaks.
Oil pressure switch failureRefer to OEM engine operator’s manual to identify corrective action.
High coolant temperature shutdownLow coolant levelAdd coolant if needed. Allow engine to cool, then check coolant level in radiator. Restart engine and check coolant temperature. Stop engine immediately if coolant temperature is 210°F (99°C) or more.
Blockage in radiatorInspect radiator shroud and ducting for blockage and remove any foreign matter.
Leakage in coolant hoses, engine block, or water pumpInspect for visible leaks. Verify tension of water pump serpentine drive belt.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Generac MLT5080 troubleshooting guide (9 entries) →

Parts

4
Part #DescriptionQtySystem
10000034752LED modules and driversService part / kit Amazon eBay
209649Form: SFC626B1Service part / kit Amazon eBay
MILT3060240 VAC 50 Amp Twistlock Outlets1Service part / kit Amazon eBay
MIT3080240 VAC 30 Amp Twistlock Outlets1Service part / kit Amazon eBay $319.99

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

Owner's manual — 10413 (Generac)Owner's manual — 33358 (Generac)