HomeMagnumMagnum MMG25FHI

Magnum MMG25FHI Generator Set

The Magnum MMG25FHI is a 20 kW (25 kVA) diesel standby generator set powered by a Isuzu 4LE1NYGV-03 engine. It is available at 120/240 V, 120/208 V and 277/480 V, single-phase and 60 Hz. It holds about 3.5 L (0.9 gal) of oil and 4.5 L (1.2 gal) of coolant, with a maximum ambient rating of 48.89 °C. Starting uses battery rated 720 CCA. The set measures 2410×890×1320 mm (94.9×35.0×52.0 in), weighs about 1038 kg (2288 lb) and produces 68 dBA at 7 m. An integrated tank holds 401.2 L (106.0 gal), roughly 45.4 hours of runtime.

20 kW
Standby
2.2 L
Displacement
3.5 L
Oil capacity
1
Document types

Typical fuel consumption for 20–25 kW Diesel generators →

Compare with other 20–25 kW Diesel generators →

Service parts for the MMG25FHI

Grouped by system, with how many of each the parts manual calls for.

Air intake

1 required
12969Air filtersee priceAmazon

Fuel system

1 required

Oil system

1 required

Belts

1 required

Prices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.

Specifications

Fueldiesel
Frequency60.0 Hz
Standby power20 kW
Standby kVA25
Prime power18 kW
EmissionsTier IV Interim
ControllerMicroprocessor-based controller
Oil capacity3.5 L
Voltage options120/240 V, 120/208 V, 277/480 V
Phasesingle/three
Circuit breaker90 A
Battery cranking720 CCA
Max ambient48.89 °C
Dimensions (L×W×H)2410×890×1320 mm
Dry weight1038 kg
Sound level68.0 dBA @ 7 m
Fuel tank401.2 L
Tank runtime45.4 hr

Engine

Isuzu 4LE1NYGV-03
Oil capacity3.5 L
Coolant capacity4.5 L
Displacement2.2 L
AspirationN/A
Rated speed1800 rpm

Maintenance & consumables

for the Isuzu 4LE1NYGV-03
ItemSpecCapacityPart #Interval
Air filterFilter, air - metallic12969 Amazon eBay
Fuel filterAPI SL or better8944015310500 hr Amazon eBay $86.33
Oil filterAPI SL or better58761000801000 hr Amazon eBay $16.89 PartsGeek $7.98
BatteryGroup 24×1500 hr
BeltBelt, fan22258 Amazon eBay
Coolant1000 hr
Coolant filterN/A
Oil500 hr
Spark plugN/A1000 hr

Common questions

How many kW is the Magnum MMG25FHI?

The Magnum MMG25FHI is rated 20 kW standby (25.0 kVA).

What engine is in the Magnum MMG25FHI?

The Magnum MMG25FHI is powered by the Isuzu 4LE1NYGV-03 engine.

What kind of fuel does the Magnum MMG25FHI run on?

The Magnum MMG25FHI runs on diesel.

How much oil does the Magnum MMG25FHI take?

The Isuzu 4LE1NYGV-03 engine in the Magnum MMG25FHI has an oil capacity of 3.5 liters.

Which oil filter part number does the Magnum MMG25FHI take?

The Magnum MMG25FHI uses oil filter part number 5876100080.

Which fuel filter part number does the Magnum MMG25FHI take?

The Magnum MMG25FHI uses fuel filter part number 8944015310.

What air filter does the Magnum MMG25FHI use?

The Magnum MMG25FHI uses air filter part number 12969.

Parts

30
Part #DescriptionQtySystem
12969Condenser (magneto)1Air filter Amazon eBay
12973Element, air filter1Air filter Amazon eBay
13378Gasket, silicone2Gasket Amazon eBay
15006Cable, .188 in. x 27 ft. w/ball swedge1Cable Amazon eBay FridayParts $629.99
15183Filter, oil - Isuzu1Oil filter Amazon eBay
15331Fuel filter element1Fuel filter Amazon eBay
15612Cable, 16-7 cold mast drape1Hose Amazon eBay
22258Belt, fan1Belt Amazon eBay
26049Alternator, Isuzu1Alternator Amazon eBay
285PSL5260Generator Model 285PSL52601Generator Amazon eBay
34424Decal Set, Voltage Selector Switch (x2)1Voltage selector switch decal set Amazon eBay
50018Hose - .312 ID 50 PSI1.67 ftHose Amazon eBay
PE4024HF285Engine Model PE4024HF2851Engine Amazon eBay
12142Decal, ground1Service part / kit Amazon $162.97 eBay
13370Assembly, tether1Service part / kit Amazon eBay FridayParts $99.99
13660Radiator, 20kW wide1Service part / kit Amazon eBay
14262Sheave, 3 in.2Service part / kit Amazon eBay
15002Clamp, cable - .1882Service part / kit Amazon eBay
15003Thimble, cable1Service part / kit Amazon eBay
16600Winch, manual1Service part / kit Amazon eBay FridayParts $199.89
19258FAN, 15.75 IN1Service part / kit Amazon eBay
22419BBracket, overflow jug .5 gal-black1Service part / kit Amazon eBay
24942Decal, Patented 7,642,665,B2Service part / kit Amazon eBay
26286Decal, Hood Service1Service part / kit Amazon eBay FridayParts $229.95
26386Decal, pinch point1Service part / kit Amazon eBay
26387Decal Set, Rear Hood Latch1Service part / kit Amazon eBay FridayParts $18.23
30093GSC Alarm StatusService part / kit Amazon eBay
30175Decal, UN31A Tank Caution (Optional)1Service part / kit Amazon eBay FridayParts $85.00
34275Decal, Caution - 120 & 240 Outlets: 600V (MMG100CAN6 Only)1Service part / kit Amazon eBay
34425Decal, Terminal Connections - 600V1Service part / kit 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%3.40.9
Prime75%5.31.4
Prime100%6.81.8

Available documents

Spec sheet — MMG25FHI Mobile (Magnum)
Full service, cheapest listings

Priced items from this model's own parts manual.

Fuel filter 8944015310$86.33
Oil filter 5876100080$7.98
2 priced items$94.31
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