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Magnum MMG205 Generator Set

The Magnum MMG205 is a 174 kW (217 kVA) diesel standby generator set powered by a John Deere PE6068HFG95 engine. It is available at 120 V, 139 V, 208 V, 220 V, 240 V, 277 V and 480 V, 1Ø, 3Ø, 60 Hz and rated 646 A. It holds about 31.2 L (8.2 gal) of oil and 29.8 L (7.9 gal) of coolant, with a maximum ambient rating of 48.9 °C. Starting uses 1 group-31 battery rated 1000 CCA at 12 V. The set measures 3660×1270×1960 mm (144.1×50.0×77.2 in), weighs about 3005 kg (6625 lb) and produces 68 dBA at 7.01 m. An integrated tank holds 1295 L (342.1 gal), roughly 24 hours of runtime. The same PE6068HFG95 engine also powers generator sets from Generac.

174 kW
Standby
6.8 L
Displacement
31.2 L
Oil capacity
2
Document types

Typical fuel consumption for 170–175 kW Diesel generators →

Compare with other 170–175 kW Diesel generators →

On this pageSpecsEngineMaintenanceFuel consumptionDocumentsFAQService intervalsFluidsFault codes

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power174 kW
Standby kVA217
Prime power164 kW
Emissions4i
ControllerPower Zone
Oil capacity31.2 L
AlternatorMarathon 431PSL6336
Voltage options120 V, 139 V, 208 V, 220 V, 240 V, 277 V, 480 V
Phase1Ø, 3Ø
Rated current646 (240V 1Ø) A
Power factor1 (1Ø), 0.8 (3Ø)
Circuit breaker800 A
Battery group31
Battery cranking1000 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity29.8 L
Max ambient48.9 °C
Dimensions (L×W×H)3660×1270×1960 mm
Dry weight3005 kg
Wet weight4106 kg
Sound level68.0 dBA @ 7.01 m
Fuel tank1295.0 L
Tank runtime24 hr

Engine

John Deere PE6068HFG95
Oil capacity31.2 L
Coolant capacity29.8 L
Displacement6.8 L
Aspirationturbocharged
Rated speed1800 rpm

Maintenance & consumables

for the John Deere PE6068HFG95
ItemSpecCapacityPart #Interval
Air filter—
Fuel filter—500 hr
Oil filter—500 hr
Battery—500 hr
Oil31.2 qt—500 hr

Service intervals

4
ItemActionHoursMonthsNotes
Engine mountsCheck500 hr12 mo
Engine oil and oil filterChange500 hr12 moAfter first 100 hours, then every 500 hours; every 250 hours if not using John Deere Plus 50 II
Fuel filter elementsReplace500 hr12 mo
Generator drive plate torqueCheck3000 hr36 mo

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

FluidGradeStandardAmbientCapacityNotes
Engine oilJohn Deere Plus 50 II recommended31.2 qtChange interval: 500 hours on John Deere Plus 50 II; 250 hours on other oils
FuelClean diesel fuel1295.0 LUse only clean diesel fuel

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

Fault codes

7
CodeNameMeaningSeverityAction
Coolant temperature shutdownCoolant temperature shutdown - 230°FShutdown
Coolant temperature warningCoolant temperature warning - 220°FWarning
Fuel level shutdownFuel level shutdown - 5%Shutdown
Fuel level warningFuel level warning - 15%Warning
Oil pressure shutdownOil pressure shutdown - 20 psiShutdown
Oil pressure warningOil pressure warning - 25 psiWarning
OverspeedOverspeed protection - 115%Shutdown

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 Magnum MMG205?

The Magnum MMG205 is rated 174 kW standby (217.0 kVA).

What engine does the Magnum MMG205 use?

The Magnum MMG205 is powered by the John Deere PE6068HFG95 engine.

What kind of fuel does the Magnum MMG205 run on?

The Magnum MMG205 runs on diesel.

What's the oil capacity on a Magnum MMG205?

The John Deere PE6068HFG95 engine in the Magnum MMG205 has an oil capacity of 31.2 liters.

What alternator comes on the Magnum MMG205?

The Magnum MMG205 uses a Marathon 431PSL6336 alternator.

Troubleshooting

6

Fault codes

CodeMeaningRemedy
00383Exhaust Filter Cleaning enabled.
1To ServiceOil Maintenance

Symptoms & remedies

SymptomCauseRemedy
LOW FUEL LEVEL SHUTDOWNFuel level on the LCD window is low, fuel tank has leaks, fuel level sender or wiring damaged.Check and refill fuel. Inspect for leaks. Check fuel level sender and wiring.
LOW OIL PRESSURE SHUTDOWNOil pressure is less than 20 psi, engine has oil leaks.Check oil level with dipstick. Visually inspect for leaks. Restart and verify oil pressure. Check oil pressure sender.
LOW COOLANT LEVEL SHUTDOWNCoolant level in the radiator is low, coolant hoses, engine block or water pump have visible leaks.Check and add coolant. Inspect for leaks. Check engine oil for mixed coolant.
HIGH COOLANT TEMPERATURE SHUTDOWNCoolant temperature is 230°F or more.Check coolant level in overflow jug. Add coolant if low. Stop engine immediately.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Magnum MMG205 troubleshooting guide (10 entries) →

Parts

1
Part #DescriptionQtySystem
P-205-003Fuel Filter1Fuel filter Amazon 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.

Fuel consumption

RatingLoadL/hgal/h
Prime50%24.26.4
Prime75%36.39.6
Prime100%48.512.8
Standby100%28.07.4

Available documents

Spec sheet (Magnum)Spec sheet — MMG205 Mobile (Magnum)Operator's manual — 48962 (Magnum)
Other sets with this engine
Generac MMG205Magnum MMG205 Super Start