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Home›Generac›Generac MMG45IF4

Generac MMG45IF4 Generator Set

The Generac MMG45IF4 is a 40 kW (50 kVA) diesel standby generator set powered by a Isuzu 4LE2XAGV01 engine. It is available at 120 V, 139 V, 208 V, 220 V, 240 V, 277 V, 440 V and 480 V, 3-phase, 60 Hz and rated 60 A. It holds about 11.4 L (3.0 gal) of oil and 17 L (4.5 gal) of coolant, with a maximum ambient rating of 49 °C. Starting uses 1 battery rated 720 CCA at 12 V. The set measures 3810×1450×2110 mm (150.0×57.1×83.1 in), weighs about 1525 kg (3362 lb) and produces 66 dBA at 7 m. An integrated tank holds 379 L (100.1 gal), roughly 27 hours of runtime.

40 kW
Standby
2.2 L
Displacement
11.4 L
Oil capacity
3
Document types

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power40 kW
Standby kVA50
Prime power36 kW
EmissionsFinal Tier 4
ControllerDSE 7310 MKII, Electronics Model 7310 MKII, Power Zone
Oil capacity11.4 L
Voltage options120 V, 139 V, 208 V, 220 V, 240 V, 277 V, 440 V, 480 V
Phase3
Rated current60 A
Power factor0.8
Circuit breaker225 A
Battery cranking720 CCA
Battery voltage12 V
Battery quantity1
Coolant capacity17.0 L
Max ambient49 °C
Dimensions (L×W×H)3810×1450×2110 mm
Dry weight1525 kg
Sound level66.0 dBA @ 7 m
Fuel tank379.0 L
Tank runtime27 hr

Engine

Isuzu 4LE2XAGV01
Oil capacity11.4 L
Coolant capacity17.0 L
Displacement2.2 L
AspirationTurbocharged & Aftercooled
Rated speed1800 rpm

Maintenance & consumables

for the Isuzu 4LE2XAGV01
ItemSpecCapacityPart #Interval
Air filter— find
Belt— find
Coolant—
Fuel filter— find
Oil—50 hr
Oil filter— find

Parts

77
Part #DescriptionQtySystem
000864 Position Voltage Selector Switch OptionVoltage selector switch buy
00204Central Lift PointCentral lift point buy
00230EMERGENCY STOP SWITCHEmergency stop switch buy
00231Remote Start Switch TerminalsRemote start switch terminals buy
00489Main Circuit BreakerMain circuit breaker buy
00497LCD windowLcd window buy
00498LED’sLeds buy
00499Ready/Manual LEDReady manual led buy
00500FAULT RESETFault reset button buy
00565Central Lift PointCentral lift point buy
00566120V GFCI ReceptaclesGfcireceptacle buy
01035Central Lift PointCentral lift point buy
010417Oil and filter1Oil buy
010418Fuel filter1Fuel filter buy
010419Air filter1Air filter buy
010420Coolant and filter1Coolant buy
010421Belt1Belt buy
010422Battery service1Battery service buy
010423Spark plugs1Spark plug buy
01144ControllerController buy
1289Oil Filter1Oil filter buy
1347Fuel Filter1Fuel filter buy
1369Air Filter1Air filter buy
1374Belt1Belt buy
1389Battery1Battery buy
1407Spark Plug1Spark plug buy
19351Seal, U-channel6Seal buy
35/55Battery Type - 12V (1)1Battery buy
00128Digital Controller Information Displays, Functions, and ResetService part / kit buy
00493Run HoursService part / kit buy
00496Operation KeypadService part / kit buy
00558OPERATING MANUALService part / kit buy
008083Unit ID tag (located behind breaker door beneath breakers)1Service part / kit buy
12451Cord, bungee - 6 in2Service part / kit buy
13926Tether, cable steel - 14.50 in. long For .32 ID holes1Service part / kit buy
16479Assembly, roof access panel1Service part / kit buy
18459Hinge, right (male)1Service part / kit buy
18460Hinge, left (female)1Service part / kit buy
18461Hinge, left (male)1Service part / kit buy
18462Hinge, right (female)1Service part / kit buy
18900ZCRod, door prop1Service part / kit buy
20916ZBracket, prop rod1Service part / kit buy
209649Digital Controller1Service part / kit buy
22936BBracket, lifting eye1Service part / kit buy
29558BBracket, cable carrier - side2Service part / kit buy
29559BBracket, cable carrier - center1Service part / kit buy
29595Set, cable - 4W banded, #2 SC - 50 ft1Service part / kit buy
29597Cord, electrical - 50 ft1Service part / kit buy
29624Strap, velcro wire wrap - 10 in2Service part / kit buy
29642Group, power adapters1Service part / kit buy
29653Grommet, rubber - .563 IDx.125 thick For .813 ID hole1Service part / kit buy
33667WPanel, access1Service part / kit buy
33695BPanel, roof insert1Service part / kit buy
33892Foam, front roof access1Service part / kit buy
34678BSpacer, 4.0x1.38x.1252Service part / kit buy
34682BAssembly, roof1Service part / kit buy
50230Weatherstripping - .188x.5007.5Service part / kit buy
60011Washer, M12 split lock4Service part / kit buy
60012Washer, M12 flat4Service part / kit buy
60013Nut, M12-1.75 hex, class 104Service part / kit buy
60048Pin, roll - .125x.6251Service part / kit buy
60065Screw, M12-1.75x40 sflg hex, G10.84Service part / kit buy
60095Nut, .312-18 sflg4Service part / kit buy
60144Nut, .250-20 nylock, G54Service part / kit buy
60260Rivet, .188 dia. x .375 to .500 grip2Service part / kit buy
60452Washer, .313 flat 1.125/1.0 bonded rubber, SS27Service part / kit buy
60507Screw, .312-18x1.0 std hex, SS19Service part / kit buy
60654Screw, .312-18x1.0 button hex, SS6Service part / kit buy
60684Screw, .250-20x.875 std hex, SS4Service part / kit buy
60696Washer, .250 flat .625/.050, SS8Service part / kit buy
60716Clamp, tubing - 1.50 lt duty1Service part / kit buy
61052Screw, .312-18x1.50 std hex, SS2Service part / kit buy
61055Clip, rob hold - adhesive backed3Service part / kit buy
61066Screw, .312-18x1.0 carr sqr, SS4Service part / kit buy
63328Screw, .312-18x.500 button soc hex, SS4Service part / kit buy
63329Nut, .312-18 acorn4Service part / kit buy
66108Solargizer, 12V, 5W1Service part / kit buy

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
Prime2.650.7
Prime50%6.41.7
Prime75%9.42.5
Prime100%12.53.3
Standby110%14.43.8

Available documents

Spec sheetOwner's manualService manual