Specifications
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 158 kW |
| Prime power | 144 kW |
| Oil capacity | 14.5 L |
| Alternator | Marathon 363PSL1607 |
| Voltage options | 120 V, 139 V, 208 V, 220 V, 240 V, 277 V |
| Phase | 3Ø |
| Rated current | 441 A |
| Power factor | 1 (1Ø), 0.8 (3Ø) |
| Circuit breaker | 450 A |
| Battery group | 24 |
| Battery cranking | 1000 CCA |
| Battery voltage | 12V V |
| Battery quantity | 1 |
| Dry weight | 2463 kg |
| Fuel tank | 1295.0 L |
| Tank runtime | 44 hr |
Engine
| Oil capacity | 13.7 L |
|---|---|
| Coolant capacity | 29.8 L |
| Displacement | 4.5 L |
| Aspiration | turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the John Deere PE4045HF285| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | ||||
| Oil filter | — | ||||
| Battery | — | ||||
| Belt | — | ||||
| Coolant | — | ||||
| Coolant filter | — | ||||
| Oil | — | ||||
| Spark plug | — |
Common questions
What is the power rating of the Magnum MMG120 Super Start?
The Magnum MMG120 Super Start is rated 158 kW standby.
What engine does the Magnum MMG120 Super Start use?
The Magnum MMG120 Super Start is powered by the John Deere PE4045HF285 engine.
How much oil does the Magnum MMG120 Super Start take?
The John Deere PE4045HF285 engine in the Magnum MMG120 Super Start has an oil capacity of 13.7 liters.
What alternator does the Magnum MMG120 Super Start use?
The Magnum MMG120 Super Start uses a Marathon 363PSL1607 alternator.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| LOW FUEL LEVEL SHUT DOWN | Fuel level on the Liquid Crystal Display (LCD) window is low or fuel tank has leaks. | Check the fuel level and ensure it is not running dry. Check for leaks in the fuel tank. |
| LOW OIL PRESSURE SHUT DOWN | Engine oil pressure is less than 20 psi (138 kPa). | Check engine oil level and add oil if required. Visually inspect the engine for oil leaks. |
| LOW COOLANT LEVEL SHUT DOWN | Coolant level in the radiator is low or coolant lines have visible leaks. | Check the coolant level and add coolant if necessary. Inspect for leaks in coolant hoses, engine block, and water pump. |
| HIGH COOLANT TEMPERATURE SHUT DOWN | Coolant temperature is 230°F (110°C) or more. | Check coolant level in the overflow jug and add coolant if necessary. Inspect radiator, coolant hoses, engine block, water pump for leaks. Check serpentine drive belt tension. |
| OVERCRANK SHUT DOWN | Engine will not start. | Check fuel level in tank and proper operation of the fuel pump. Check air filter for blockage. |
| OVERSPEED OR UNDERSPEED SHUT DOWN | Engine speed is above or below 60.0 Hz. | Disconnect all loads and restart the generator to read frequency (Hz). Adjust engine speed as necessary. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Magnum MMG120 Super Start troubleshooting guide (8 entries) →
Parts
23| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 100-001 | Air Filter | 1 | Air filter | Amazon Amazon eBay |
| 25-1476 | Air Filter Minders | 1 | Air filter | Amazon eBay |
| 25-1483 | Primary Air Cleaners | 1 | Air filter | Amazon eBay |
| 25-1639 | Fuel Filters | 1 | Fuel filter | Amazon eBay |
| 25-1648 | Oil Filters | 1 | Oil filter | Amazon eBay |
| PP88S12 | Pump PP88S12 | 1 | Pump | Amazon eBay |
| 01615 | Enclosure Panels | Service part / kit | Amazon eBay | |
| 01616 | Unit Decals - Left Side - MMG120 | Service part / kit | Amazon eBay | |
| 12142 | Decal, ground | 1 | Service part / kit | Amazon $162.97 eBay |
| 18396 | Decal, Panel Light Switch, Single | 1 | Service part / kit | Amazon eBay KuduParts $53.00 |
| 21259 | Decal, Battery Charger (Optional) | 1 | Service part / kit | Amazon eBay |
| 22870 | Decal, Caution for 480V CSA | 1 | Service part / kit | Amazon eBay |
| 23597 | Decal, Panel Light Switch (Optional) | 1 | Service part / kit | Amazon eBay |
| 23827 | Decal, Controller Switches | 1 | Service part / kit | Amazon eBay |
| 23846 | Decal, Controller Instructions | 1 | Service part / kit | Amazon eBay |
| 24904 | Decal, 4 Pos. Outlet Usage in Delta (Optional for MMG100CAN Only) | 1 | Service part / kit | Amazon eBay |
| 28964 | Decal, Engine Block Heater (Optional) | 1 | Service part / kit | Amazon eBay |
| 30175 | Decal, UN31A Tank Caution (Optional) | 1 | Service part / kit | Amazon eBay FridayParts $85.00 |
| 30176 | Decal, Flex - Tier III | 1 | Service part / kit | Amazon eBay FridayParts $109.99 |
| 31024 | Decal, Fan Clutch (Optional) | 1 | Service part / kit | Amazon eBay |
| 33787 | Decal, Generator - Voltage Configuration (MMG100CAN6 Only) | 1 | Service part / kit | Amazon eBay |
| 34274 | Decal, Generator - 600V Circuit Breakers (MMG100CAN6 Only) | 1 | Service part / kit | Amazon eBay |
| 34275 | Decal, Caution - 120 & 240 Outlets: 600V (MMG100CAN6 Only) | 1 | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Prime | 65.8 | 17.38 | |
| Prime | 100% | 32.3 | 8.53 |
| Standby | 100% | 28.0 | 7.4 |
Available documents
Service manual — MMG235 (Operation) (Magnum)