The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E is a 2.2 L 4-cylinder liquid cooled, 4-stroke engine rated at 1800 rpm. It powers generator sets from Generac, including the MLT4250. It holds 8.6 L (2.3 gal) of oil and 11.6 L (3.1 gal) of coolant.
Also known as: Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E
Part of the Isuzu 4LE1NYGV engine family — 7 variants share parts & fitment.
| Oil capacity | 8.6 L |
|---|---|
| Coolant capacity | 11.6 L |
| Displacement | 2.2 L |
| Cylinders | 4 |
| Aspiration | liquid cooled, 4-stroke |
| Rated speed | 1800 rpm |
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 250 hr | find | ||
| Fuel filter | 8944015310 | 250 hr | PartsGeek | ||
| Oil filter | 670570304 | 250 hr | PartsGeek $7.98 | ||
| Belt | — | 250 hr | find | ||
| Coolant | — | 250 hr | |||
| Oil | — | 250 hr |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Part # | Description | Category |
|---|---|---|
| 12969 | Filter, air - metallic | air_filter |
| 12973 | Element, air filter | air_filter |
| 100A | Alternator | alternator |
| 26049 | Alternator, Isuzu | alternator |
| 22258 | Belt, fan | belt |
| 15006 | Cable, .188 in. x 27 ft. w/ball swedge | cable |
| PE4024HF285 | Engine Model PE4024HF285 | engine |
| 00130 | Fine Voltage Adjustment Screw | fine voltage adjustment screw |
| 15331 | Fuel filter element | fuel_filter |
| 13378 | Gasket, silicone | gasket |
| 285PSL5260 | Generator Model 285PSL5260 | generator |
| 002823a | Grease | grease |
| 004527 | Optional Lower Radiator Hose Heater Use and Maintenance Manual | hose |
| 15612 | Cable, 16-7 cold mast drape | hose |
| 50018 | Hose, fuel - .312 ID, 50 psi, SAE 30R7 | hose |
| 002824a | Oil | oil |
| 002825a | Oil | oil |
| 15183 | Filter, oil - Isuzu | oil_filter |
| 002806 | Phase rotation must be compatible | other_service |
| 00305 | OPERATING MANUAL | other_service |
| 004526 | other_service | |
| 004528 | other_service | |
| 004542 | Control Power switch | other_service |
| 004544 | Main Circuit Breaker | other_service |
| 004551 | Equipment Damage. Failure to perform a daily inspection could result in damage to the unit. | other_service |
| 004647 | Unit Dimensions | other_service |
| 004650 | Component Locations | other_service |
| 004664 | Wiring and connections to unit | other_service |
| 004678 | Main Control Panel | other_service |
| 004680 | other_service | |
| 004681 | other_service | |
| 01203 | Combination Light Tower Generator & Water Trailer | other_service |
| 12142 | DECAL, GROUND | other_service |
| 13370 | Assembly, tether | other_service |
| 13660 | Radiator, 20kW wide | other_service |
| 14262 | Sheave, 3 in. | other_service |
| 15002 | Clamp, cable - .188 | other_service |
| 15003 | Thimble, cable | other_service |
| 16600 | Winch, manual | other_service |
| 19258 | VALVE LAPPER | other_service |
| 1NYGV-03G | other_service | |
| 22419B | BRACKET, Support | other_service |
| 22870 | Decal, Caution for 480V CSA | other_service |
| 23827 | Decal, Controller Switches | other_service |
| 23846 | Decal, Controller Instructions | other_service |
| 24942 | Decal, Patented 7,642,665,B2 | other_service |
| 26286 | Decal, Hood Service | other_service |
| 26386 | Decal, Pinch Point | other_service |
| 26387 | Decal Set, Rear Hood Latch | other_service |
| 27733 | Decal, Interior Light Switch Option | other_service |
| 30093 | GSC Alarm Status | other_service |
| 30175 | Decal, UN31A tank caution Located on tank. | other_service |
| 30496 | Decal, 3 Pos Phase Switch Located on Manual Holder. | other_service |
| 34275 | Decal, Caution - 120V & 240V Outlets | other_service |
| 34424 | Decal Set, Voltage Selector Switch (x2) | other_service |
| 34425 | Decal, Terminal Connections - 600V | other_service |
| MIT4150 | 240 VAC 50 Amp Twistlock Outlets | other_service |
| MIT4200 | 240 VAC 30 Amp Twistlock Outlets | other_service |
| 00087 | Twist-Lock Receptacles | receptacle |
| 12398 | Receptacle Panel (2x5-20R, 2xL6-30R, 2x50A) | receptacle_panel |
| 00174 | Engine exhaust system components | seal |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
Cross-referenced via Donaldson + OEM/engine-maker interchange — options to verify against your serial number, not confirmed for every exact variant.
Other equipment known to use this engine, via filter-application cross-reference — useful for sourcing parts even when your exact machine isn't listed elsewhere on this page.
The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E engine has an oil capacity of 8.6 liters.
The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E has a displacement of 2.2 liters with 4 cylinders.
The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E powers 1 generator set(s), including Generac MLT4250.
The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E uses oil filter part numbers Generac 670570304, Isuzu 5876100080, Donaldson P550162.
The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E uses fuel filter part numbers Isuzu 8944015310, Donaldson P502166, Wix 33263.
The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E uses air filter part numbers Generac OE3557, Generac OE3656, Isuzu 5864014350.
The Isuzu 4LE1NYGV-03 / 4LE1NYGV-03E oil change interval is every 250 hours.