Service parts for the MLT4200
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 25 kW |
| Standby kVA | 34 |
| Prime power | 17 kW |
| Oil capacity | 3.5 L |
Engine
| Oil capacity | 3.5 L |
|---|---|
| Coolant capacity | 4.5 L |
| Displacement | 2.2 L |
| Aspiration | N/A |
| Rated speed | 1800 rpm |
Same engine, other brands
1 brandThe Isuzu 4LE1NYGV-03 in this set also powers 3 generator sets 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, MMG25FHI, MMG25FHICAN6 |
Maintenance & consumables
for the Isuzu 4LE1NYGV-03| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Filter, air - metallic | 12969 | Amazon eBay | ||
| Fuel filter | API SL or better | 8944015310 | 500 hr | Amazon eBay $86.33 NAPA $16.78 | |
| Oil filter | API SL or better | 5876100080 | 1000 hr | Amazon eBay $16.89 PartsGeek $7.98 NAPA $14.75 | |
| Battery | Group 24 | ×1 | — | 500 hr | |
| Belt | Belt, fan | 22258 | Amazon eBay | ||
| Coolant | — | 1000 hr | |||
| Coolant filter | N/A | — | |||
| Oil | — | 500 hr | |||
| Spark plug | N/A | — | 1000 hr |
Common questions
What size generator is the Generac MLT4200?
The Generac MLT4200 is rated 25 kW standby (34.5 kVA).
Which engine powers the Generac MLT4200?
The Generac MLT4200 is powered by the Isuzu 4LE1NYGV-03 engine.
What's the oil capacity on a Generac MLT4200?
The Isuzu 4LE1NYGV-03 engine in the Generac MLT4200 has an oil capacity of 3.5 liters.
What is the coolant capacity of the Generac MLT4200?
The Generac MLT4200 cooling system holds 4.5 liters (1.2 US gallons) for the engine, per the manufacturer specification sheet.
What is the prime power rating of the Generac MLT4200?
The Generac MLT4200 is rated 17 kW prime (23 kVA), against 25 kW standby.
What oil filter does the Generac MLT4200 use?
The Generac MLT4200 uses oil filter part number 5876100080.
What fuel filter fits the Generac MLT4200?
The Generac MLT4200 uses fuel filter part number 8944015310.
Which air filter part number does the Generac MLT4200 take?
The Generac MLT4200 uses air filter part number 12969.
Troubleshooting
7Fault codes
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| (000139) | Low oil pressure shutdown | Low oil level | Verify oil level on dipstick. Add oil, if needed. |
| (000278) | High coolant temperature shutdown | Low coolant level | Add coolant if needed. Allow engine to cool, then check coolant level in radiator. Restart engine and check coolant temperature. Stop engine immediately if coolant temperature is 210°F (99°C) or more. |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Oil leaking from engine | Visually inspect the engine for leaks. | |
| Blockage in radiator | Inspect radiator shroud and ducting for blockage and remove any foreign matter. | |
| Leakage in coolant hoses, engine block, or water pump | Inspect for visible leaks. Verify tension of water pump serpentine drive belt. | |
| Unit cranks, but will not start | Fuel level low Verify fuel pump operation. Restricted air filter | Check fuel level in tank. Inspect air filter for blockage. |
| Overspeed or Underspeed Shutdown | Frequency setting incorrect | Disconnect all loads and restart unit. Read frequency (Hz) in the LCD window on controller. Frequency should read 60 Hz. If frequency is above 60 Hz, engine speed will need to be adjusted. Refer to the engine operator’s manual for throttle adjustment information. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
32| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 12969 | Condenser (magneto) | 1 | Air filter | Amazon eBay |
| 12973 | Element, air filter | 1 | Air filter | Amazon eBay |
| 13378 | Gasket, silicone | 2 | Gasket | Amazon eBay |
| 15006 | Cable, .188 in. x 27 ft. w/ball swedge | 1 | Cable | Amazon eBay FridayParts $629.99 |
| 15183 | Filter, oil - Isuzu | 1 | Oil filter | Amazon eBay |
| 15331 | Fuel filter element | 1 | Fuel filter | Amazon eBay |
| 15612 | Cable, 16-7 cold mast drape | 1 | Hose | Amazon eBay |
| 22258 | Belt, fan | 1 | Belt | Amazon eBay |
| 26049 | Alternator, Isuzu | 1 | Alternator | Amazon eBay |
| 285PSL5260 | Generator Model 285PSL5260 | 1 | Generator | Amazon eBay |
| 50018 | Hose, fuel - .312 ID, 50 psi, SAE 30R7 | 3 | Hose | Amazon eBay |
| PE4024HF285 | Engine Model PE4024HF285 | 1 | Engine | Amazon eBay |
| 12142 | Decal, ground | 1 | Service part / kit | Amazon eBay NAPA $74.66 |
| 13370 | Assembly, tether | 1 | Service part / kit | Amazon eBay FridayParts $99.99 |
| 13660 | Radiator, 20kW wide | 1 | Service part / kit | Amazon eBay |
| 14262 | Sheave, 3 in. | 2 | Service part / kit | Amazon eBay |
| 15002 | Clamp, cable - .188 | 2 | Service part / kit | Amazon eBay |
| 15003 | Thimble, cable | 1 | Service part / kit | Amazon eBay |
| 16600 | Winch, manual | 1 | Service part / kit | Amazon eBay FridayParts $199.89 |
| 19258 | VALVE LAPPER | 1 | Service part / kit | Amazon eBay |
| 22419B | Bracket, overflow jug .5 gal-black | 1 | Service part / kit | Amazon eBay |
| 24942 | Decal, Patented 7,642,665,B2 | Service part / kit | Amazon eBay | |
| 26286 | Decal, Hood Service | 1 | Service part / kit | Amazon eBay FridayParts $229.95 |
| 26386 | Decal, Pinch Point | 1 | Service part / kit | Amazon eBay NAPA $45.89 |
| 26387 | Decal Set, Rear Hood Latch | 1 | Service part / kit | Amazon eBay FridayParts $18.23 |
| 30093 | GSC Alarm Status | Service part / kit | Amazon eBay | |
| 30175 | Decal, UN31A tank caution | 1 | Service part / kit | Amazon eBay NAPA $12.21 FridayParts $85.00 |
| 34275 | Decal, Caution - 120V & 240V Outlets | 1 | Service part / kit | Amazon eBay |
| 34424 | Decal Set, Voltage Selector Switch NEUTRAL BONDED TO FRAME | 1 | Service part / kit | Amazon eBay |
| 34425 | Decal, Terminal Connections - 600V | 1 | Service part / kit | Amazon eBay |
| MIT4150 | 240 VAC 50 Amp Twistlock Outlets | 2 | Service part / kit | Amazon eBay |
| MIT4250 | 240 VAC 50 Amp Twistlock Outlets | 2 | Service 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.
Available documents
This page was generated from the 4 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.