Service parts for the MDG25IF4
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredBelts
1 requiredCooling system
1 requiredElectrical
1 requiredIgnition
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 | 25 kW |
| Standby kVA | 31 |
| Prime power | 20 kW |
| Emissions | Tier 4 Final |
| Controller | Electronics 7310 MKII |
| Oil capacity | 10.4 L |
| Alternator | Marathon 283PSL1707 |
| Voltage options | 120 V, 240 V, 208 V, 480 V, 600 V |
| Phase | 3 |
| Rated current | 75 A |
| Power factor | 0.8 |
| Circuit breaker | 125 A |
| Battery group | 12 |
| Battery cranking | 720 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 16.6 L |
| Max ambient | 49 °C |
| Sound level | 67.0 dBA @ 7 m |
| Tank runtime | 35 hr |
Engine
| Oil capacity | 2.25 L |
|---|---|
| Coolant capacity | 10.4 L |
| Displacement | 1.33 L |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Isuzu 4LE2T| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | S4CJ-1004 | E25F-004 | 600 hr | Amazon eBay | |
| Fuel filter | S4CJ-1003 | E25F-003 | 600 hr | Amazon eBay | |
| Fuel filter | Secondary 8 Microns @ 98% Effi ciency | — | |||
| Oil filter | 5876100080 | 500 hr | Amazon eBay $16.89 PartsGeek $7.98 | ||
| Battery | S4CJ-1013 | E25F-013 | 600 hr | Amazon eBay | |
| Belt | S4CJ-1008 | E25F-008 | 600 hr | Amazon eBay | |
| Coolant | S4CJ-1007 | E25F-007 | Amazon eBay | ||
| Oil | S4CJ-1000 | E25F-001 | 600 hr | Amazon eBay | |
| Spark plug | S4CJ-1017 | E25F-017 | 600 hr | Amazon eBay |
Common questions
What size generator is the Generac MDG25IF4?
The Generac MDG25IF4 is rated 25 kW standby (31.0 kVA).
What engine does the Generac MDG25IF4 use?
The Generac MDG25IF4 is powered by the Isuzu 4LE2T engine.
What kind of fuel does the Generac MDG25IF4 run on?
The Generac MDG25IF4 runs on Diesel.
What is the oil capacity of the Generac MDG25IF4?
The Isuzu 4LE2T engine in the Generac MDG25IF4 has an oil capacity of 2.25 liters.
What alternator does the Generac MDG25IF4 use?
The Generac MDG25IF4 uses a Marathon 283PSL1707 alternator.
Which oil filter part number does the Generac MDG25IF4 take?
The Generac MDG25IF4 uses oil filter part number 5876100080.
Which fuel filter part number does the Generac MDG25IF4 take?
The Generac MDG25IF4 uses fuel filter part number E25F-003.
What air filter fits the Generac MDG25IF4?
The Generac MDG25IF4 uses air filter part number E25F-004.
Troubleshooting
7Symptoms & remedies
| Symptom | Remedy |
|---|---|
| Noticeable change in engine speed | Shut the engine down |
| Loss of electrical output | Shut the engine down |
| Equipment connected to the unit overheats | Shut the engine down |
| Sparking occurs | Shut the engine down |
| Engine misfires or there is excessive engine/gen-erator vibration | Shut the engine down |
| Protective covers are loose or missing | Shut the engine down |
| Ambient air temperature is above 113 °F (45 °C) | Shut the engine down |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
10model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 010418 | Fuel filter | 1 | Fuel filter | Amazon eBay $22.46 |
| 010419 | Air filter | 1 | Air filter | Amazon eBay KuduParts $147.99 |
| 010420 | Coolant and filter | 1 | Coolant | Amazon eBay FridayParts $151.60 |
| 010421 | Belt | 1 | Belt | Amazon eBay |
| 010913 | Fuel filter heaters, CCV heater, oil pan heater, block heater | Fuel filter | Amazon eBay | |
| 010493 | Transfer Switch | Service part / kit | Amazon eBay | |
| 011188 | A | Service part / kit | Amazon eBay | |
| 011196 | Main Circuit Breaker | Service part / kit | Amazon eBay | |
| 011197 | Customer Convenience Receptacles | Service part / kit | Amazon eBay | |
| 011199 | A | Service part / kit | Amazon eBay |
Compiled from this model's family documentation — may include parts for closely-related variants. 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% | 4.2 | 1.1 |
| Prime | 75% | 6.1 | 1.6 |
| Prime | 100% | 7.4 | 2.0 |
| Standby | 110% | 8.6 | 2.3 |