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 |
Same engine, other brands
3 brandsThe Isuzu 4LE2T in this set also powers 4 generator sets sold under 3 other brands. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Echo | DGK20FS, DGK25F |
| Hipower | HRIW-25 T4F |
| Isuzu | HPPI-20 |
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 NAPA $14.75 | ||
| 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 is the coolant capacity of the Generac MDG25IF4?
The Generac MDG25IF4 cooling system holds 16.6 liters (4.4 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the continuous rating of the Generac MDG25IF4?
The Generac MDG25IF4 is rated 20 kW prime (25 kVA), against 25 kW standby.
How loud is the Generac MDG25IF4?
The Generac MDG25IF4 is rated at 67.0 dBA at 7 m, per the manufacturer specification sheet.
What voltage does the Generac MDG25IF4 produce?
The Generac MDG25IF4 is offered in 120 V, 240 V, 208 V, 480 V, 600 V, 3-phase.
How many cold cranking amps does the Generac MDG25IF4 require?
The Generac MDG25IF4 uses 1 battery, 12 V each, 720 CCA, group 12, per the manufacturer specification sheet.
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
15Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Low fuel level shutdown | Low fuel level | Check fuel level in LCD window of controller. |
| Low fuel level shutdown | Unit not level | Confirm that unit is sitting level to ensure an accurate reading. |
| Low fuel level shutdown | Fuel tank leaking | Check tank for leaks. |
| Low fuel level shutdown | Damaged fuel sender or wiring | Check for continuity between sender and engine controller. (See Wiring Diagrams.) |
| Low oil pressure shutdown | Low oil level | Check oil level on dipstick. Add oil, if needed. |
| Low oil pressure shutdown | Oil leaking from engine | Visually inspect the engine for leaks. Restart unit and verify loss of pressure. Shut down immediately if pressure does not reach 5 psi (34 kPa) within five seconds. |
| Low oil pressure shutdown | Oil pressure sender | See engine operator's manual to identify corrective action. |
| Low coolant level shutdown | Low coolant level | Allow engine to cool, then check coolant level in radiator. Add coolant, if needed. |
| Low coolant level shutdown | Coolant hoses leaking | Inspect hoses for leaks. Repair or replace as necessary. |
| Low coolant level shutdown | Engine block or water pump leaking | Visually inspect for leaks. Verify no coolant has mixed with the engine oil (oil will appear milky). See engine operator's manual for additional information. |
| High coolant temperature shutdown | Low coolant level | Allow engine to cool, then check coolant level in radiator. Add coolant if needed. Restart engine and check coolant temperature (on controller). Stop engine immediately if coolant temperature is 203 °F (95 °C) or higher. |
| High coolant temperature shutdown | Blockage in radiator | Check radiator shroud and ducting for blockage and remove any foreign matter. |
| High coolant temperature shutdown | Leakage in coolant hoses, engine block, or water pump | Inspect for visible leaks. Check tension of water pump serpentine drive belt. |
| Overcrank shutdown | Fuel level low | Check fuel level in tank. Check fuel pump operation. |
| Overcrank shutdown | Blocked air filter | Check air filter for blockage. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
50model family| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 010418 | Fuel filter | 1 | Controller screen | Amazon eBay $22.46 |
| 010419 | Air filter | 1 | Air filter | Amazon eBay |
| 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 | |
| A0000389488 | Gasket | 1 | Gasket | buy |
| G047411 | SCREW HHC M6-1.0 X 16 G8.8 | 1 | Bolt | buy |
| 011188 | A | Service part / kit | Amazon eBay | |
| 011196 | Main Circuit Breaker | Service part / kit | Amazon eBay | |
| 011199 | A | Service part / kit | Amazon eBay | |
| 0A3359 | SCREW BHSC M6-1.0 X 16 SS | 16 | Service part / kit | buy |
| 0C2634 | Cover, access | 1 | Service part / kit | buy |
| 0G6131 | Screw, .M6-1.00 x 30 HHC, G8.8 | 8 | Service part / kit | buy |
| 10000014954 | Telemetry, ZTR | 1 | Service part / kit | buy |
| 10000023194 | Decal, sound auto electrical hazard | 2 | Service part / kit | buy |
| 12142 | Decal, ground | 1 | Service part / kit | Amazon eBay NAPA $74.66 |
| 15863 | Strain relief, .500NPT .260/.546 ID | 1 | Service part / kit | buy |
| 37695 | Decal, safety | 1 | Service part / kit | buy |
| 60061 | Nut, 10-32 nylock | 4 | Service part / kit | Amazon eBay |
| 60067 | Washer, #10 flat .435/.060, SS | 4 | Service part / kit | Amazon eBay KuduParts $66.00 FridayParts $68.20 |
| 60452 | Washer, .313 flat 1.125/1.0 bonded rubber, SS | 1 | Service part / kit | Amazon eBay |
| 61180 | SCREW, 10-32 X .750 PAN PHILLIPS, SS | 4 | Service part / kit | Amazon eBay |
| 61222 | Washer, #10 sealing | 16 | Service part / kit | buy |
| 62064 | Nut, 10-32 serrated flange - SS | 12 | Service part / kit | buy |
| 62268 | Screw, 10-32 x .675 pan Phillips - SS | 16 | Service part / kit | buy |
| A0000082167 | Gutter, rear | 1 | Service part / kit | buy |
| A0000116412 | Decal, do not step | 3 | Service part / kit | Amazon eBay |
| A0000192567 | Decal, voltage regulator | 1 | Service part / kit | buy |
| A0000263782 | Panel, roof | 1 | Service part / kit | buy |
| A0000375209 | Foam, enclosure - front roof | 1 | Service part / kit | buy |
| A0000419294 | Panel, front | 1 | Service part / kit | buy |
| A0000445881 | Plate, no telemetry | 1 | Service part / kit | buy |
| A0000445882 | Cover, telemetry | 1 | Service part / kit | buy |
| A0000451386 | Weldment, panel - lower rear | 1 | Service part / kit | buy |
| A0000479682 | Panel, front w/o louvers | 1 | Service part / kit | buy |
| A0000617187 | REFLECTOR RED 2X3.5 SAE A PSA | 6 | Service part / kit | Amazon eBay $2.86 |
| A0000617188 | REFLECTOR AMBER 2X3.5 SAE A PSA | 6 | Service part / kit | Amazon eBay |
| A0000639819 | Decal, controller, operation DSE 7310 | 1 | Service part / kit | buy |
| A0000684160 | Gutter, side | 2 | Service part / kit | buy |
| A0000705133 | Decal, controller, switch ID 5 position | 1 | Service part / kit | buy |
| A0000787172 | Assembly, roof | 1 | Service part / kit | buy |
| A0000787178 | Assembly, corner - fuel fill | 1 | Service part / kit | buy |
| A0000787185 | Assembly, door - standard | 2 | Service part / kit | buy |
| A0000787188 | Assembly, door - left | 1 | Service part / kit | buy |
| A0000787191 | Assembly, door - AC power distribution | 1 | Service part / kit | buy |
| A0000787193 | Assembly, panel corner - right rear | 1 | Service part / kit | buy |
| A0000787195 | Assembly, door - controls | 1 | Service part / kit | buy |
| A0000787203 | Foam, rear roof | 1 | Service part / kit | buy |
| A0000787204 | Foam, enclosure | 1 | Service part / kit | buy |
| G070007 | Washer, M6 flat - SS | 8 | Service part / kit | buy |
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 |
Available documents
This page was generated from the 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.