Service parts for the MLG25
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Standby kVA | 25 |
| Prime power | 18 kW |
| Emissions | Interim Tier IV |
| Controller | Microprocessor-based controller |
| Voltage options | 120/240 V, 120/208 V, 277/480 V |
| Circuit breaker | 90 A |
| Battery cranking | 720 CCA |
| Max ambient | 48.88 °C |
| Dimensions (L×W×H) | 2667×1727×1422 mm |
| Dry weight | 744 kg |
| Sound level | 68.0 dBA @ 7.01 m |
| Fuel tank | 211.98 L |
| Tank runtime | 31 hr |
Same engine, other brands
1 brandThe Isuzu 4LE1NYGV-01 in this set also powers 1 generator set sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Magnum | MLG 20 |
Maintenance & consumables
for the Isuzu 4LE1NYGV-01| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | dry type cartridge | — | 1000 hr | ||
| Fuel filter | 8944015310 | 250 hr | Amazon eBay $86.33 NAPA $16.78 | ||
| Oil filter | 5876100080 | 1000 hr | Amazon eBay $16.89 PartsGeek $7.98 NAPA $14.75 | ||
| Battery | — | 250 hr | |||
| Belt | — | 1000 hr | |||
| Coolant | 11.6 L | — | 250 hr | ||
| Oil | 6.7 L | — | 250 hr | ||
| Spark plug | — | 1000 hr |
Compatible filters for the Isuzu 4LE1NYGV-01 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
- Air filter: Isuzu 5864014350 Isuzu 8972599390 Donaldson P775687 Donaldson P821575 Donaldson P822858
Common questions
How many kW is the Generac MLG25?
The Generac MLG25 is rated 20 kW standby (25.0 kVA).
Which engine powers the Generac MLG25?
The Generac MLG25 is powered by the Isuzu 4LE1NYGV-01 engine.
What kind of fuel does the Generac MLG25 run on?
The Generac MLG25 runs on diesel.
What is the prime power rating of the Generac MLG25?
The Generac MLG25 is rated 18 kW prime (23 kVA), against 20 kW standby.
How loud is the Generac MLG25?
The Generac MLG25 is rated at 68.0 dBA at 7.01 m, per the manufacturer specification sheet.
How much does the Generac MLG25 weigh?
The Generac MLG25 has a dry weight of 744 kg (1640 lb).
What size fuel tank does the Generac MLG25 have?
The Generac MLG25 has a 211.98 liter (56 US gallon) fuel tank, giving about 31 hours of runtime.
What voltages is the Generac MLG25 available in?
The Generac MLG25 is offered in 120/240 V, 120/208 V, 277/480 V.
What size battery does the Generac MLG25 need?
The Generac MLG25 uses 720 CCA, per the manufacturer specification sheet.
What oil filter fits the Generac MLG25?
The Generac MLG25 uses oil filter part number 5876100080.
What fuel filter does the Generac MLG25 use?
The Generac MLG25 uses fuel filter part number 8944015310.
What air filter does the Generac MLG25 use?
The Generac MLG25 uses air filter part numbers ISUZU 5864014350, ISUZU 8972599390.
Parts
2| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 100A | Alternator | 2.25 | Alternator | Amazon eBay $100.99 FridayParts $16.28 SinoCMP $199.00 |
| 12398 | Receptacle Panel (2x5-20R, 2xL6-30R, 2x50A) | Receptacle panel | Amazon eBay $114.95 |
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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 50% | 3.41 | 0.9 |
| Prime | 75% | 5.11 | 1.35 |
| Prime | 100% | 6.81 | 1.8 |