Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 20 kW |
| Standby kVA | 20 |
| Prime power | 19 kW |
| Emissions | Tier IV Final |
| Controller | Power Zone, Power Zone digital |
| Oil capacity | 7.6 L |
| Alternator | Marathon 334CSA3028 |
| Voltage options | 120/240 V |
| Phase | Single phase |
| Rated current | 83 A |
| Power factor | 1 |
| Circuit breaker | 100 A |
| Battery cranking | 720 CCA |
| Coolant capacity | 11.3 L |
| Max ambient | 50 °C |
| Dimensions (L×W×H) | 2670×1730×1420 mm |
| Dry weight | 667 kg |
| Sound level | 70.0 dBA @ 7 m |
| Fuel tank | 165.4 L |
| Tank runtime | 23.8 hr |
Engine
| Oil capacity | 7.6 L |
|---|---|
| Coolant capacity | 11.3 L |
| Displacement | 2.2 L |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Isuzu 4LE2TAG| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 250 hr | find | ||
| Fuel filter | Fuel filter with replaceable element | 69858 | 500 hr | Amazon eBay $42.74 PartsGeek | |
| Oil filter | Full flow oil filter, spin on type | 670570304 | 1000 hr | PartsGeek FridayParts $20.19 | |
| Belt | — | 1000 hr | find | ||
| Coolant | — | 250 hr | |||
| Oil | — | 250 hr |
Compatible filters for the Isuzu 4LE2TAG — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
- Air filter: Generac OE3557 Generac OE3656 Isuzu 8972319000 Isuzu 5864014350 Isuzu 8972599390
Common questions
What is the power rating of the Generac MLG20IF4?
The Generac MLG20IF4 is rated 20 kW standby (20.0 kVA).
What engine does the Generac MLG20IF4 use?
The Generac MLG20IF4 is powered by the Isuzu 4LE2TAG engine.
What fuel does the Generac MLG20IF4 use?
The Generac MLG20IF4 runs on diesel.
What is the oil capacity of the Generac MLG20IF4?
The Isuzu 4LE2TAG engine in the Generac MLG20IF4 has an oil capacity of 7.6 liters.
What alternator does the Generac MLG20IF4 use?
The Generac MLG20IF4 uses a Marathon 334CSA3028 alternator.
Parts
32| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 002306 | Grease for trailer wheel bearings | Fluid | PartsGeek | |
| 002327 | Remote Start Terminal Block | Remote start terminal block | PartsGeek | |
| 00243 | Grease | Oil | PartsGeek | |
| 002807 | WHITE Incoming utility power GRAY Normal utility power circuit BLACK Emergency generator power circuit | Transfer switch | PartsGeek | |
| 003784 | Lubricant for winch maintenance | Fluid | PartsGeek | |
| 003984 | Remote Start Terminal Block | Remote start terminal block | PartsGeek | |
| 006983 | Transfer Switch | Transfer switch | PartsGeek | |
| 00852 | Home and generator voltage and frequency operator screens | Operator screen | PartsGeek | |
| 90243 | Grease | Grease | PartsGeek | |
| 00131 | PROPER MAST CABLE ROUTING | Service part / kit | PartsGeek | |
| 00194 | Breakers Located Behind The Panel | Service part / kit | PartsGeek | |
| 00204 | Use Lower Forklift Pockets To Lift Do NOT Use To Lift | Service part / kit | PartsGeek | |
| 00206 | Transfer Switch Diagram | Service part / kit | PartsGeek | |
| 00229 | Water Supply and Mast Lowering Instructions | Service part / kit | PartsGeek | |
| 002329 | Scheduler Screen | Service part / kit | PartsGeek | |
| 002354 | Operator Screens | Service part / kit | PartsGeek | |
| 002355 | Spark Arrester | Service part / kit | PartsGeek | |
| 002544 | Home Screen | Service part / kit | PartsGeek | |
| 003779 | Maintenance Screen | Service part / kit | PartsGeek | |
| 003780 | Event Log Screen | Service part / kit | PartsGeek | |
| 003781 | Faults | Service part / kit | PartsGeek | |
| 003782 | Underspeed | Service part / kit | PartsGeek | |
| 003975 | Service part / kit | PartsGeek | ||
| 003980 | High Voltage. Verify area above unit is clear of overhead wires and obstructions. Contact with high-voltage power lines will result in death or serious injury. | Service part / kit | PartsGeek | |
| 003981 | WARNING Consult Manual. Read and understand manual completely before using product. Failure to completely understand manual and product could result in death or serious injury. | Service part / kit | PartsGeek | |
| 004551 | Do Not Start sign | Service part / kit | PartsGeek | |
| 00851 | Stop/Reset Mode LED | Service part / kit | PartsGeek | |
| 00886 | Remote Start Switch Terminals | Service part / kit | PartsGeek | |
| 00899 | Turn Lights On or Off Individually | Service part / kit | PartsGeek | |
| 00900 | MTT20IF4 | 1 | Service part / kit | PartsGeek |
| 00908 | Use Lower Forklift Pockets To Lift Do NOT Use To Lift | Service part / kit | PartsGeek | |
| 209649 | Form: SFC626B | Service part / kit | PartsGeek |
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 | 7.8 | 3.5 | |
| Prime | 50% | 2.46 | 0.65 |
| Prime | 75% | 3.71 | 0.98 |
| Prime | 100% | 5.11 | 1.35 |
Available documents
Spec sheet — Generac MLG20IF4 SPEC-5-9-19 (Generac)Spec sheet — mlg20if4 mobile-diesel-generator-set spec-sheet (Generac)Operator's manual — 37100 (Generac)