Service parts for the MMG100D
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredCooling system
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 | 86 kW |
| Standby kVA | 107 |
| Prime power | 78 kW |
| Emissions | Interim Tier IV |
| Controller | Power Zone |
| Oil capacity | 15.5 L |
| Alternator | Marathon 363PSL1607 (1661) (Class H insulation) |
| Voltage options | 120/240 V, 120/208 V, 277/480 V |
| Phase | 3 |
| Circuit breaker | 400 A |
| Battery cranking | 720 CCA |
| Battery quantity | 1 |
| Max ambient | 48.9 °C |
| Dimensions (L×W×H) | 3022×1022×1572 mm |
| Dry weight | 1714 kg |
| Wet weight | 2150 kg |
| Sound level | 68.0 dBA @ 7 m |
| Fuel tank | 624.8 L |
| Tank runtime | 24 hr |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Filter | 100-025 | Amazon eBay | ||
| Fuel filter | Fuel Filter | 100-045 | Amazon eBay FridayParts $20.19 | ||
| Oil filter | Oil Filter | 100-030 | Amazon eBay | ||
| Belt | Belt | 100-085 | Amazon eBay | ||
| Coolant filter | Coolant Filter | 100-060 | Amazon eBay |
Common questions
What is the power rating of the Magnum MMG100D?
The Magnum MMG100D is rated 86 kW standby (107.0 kVA).
What kind of fuel does the Magnum MMG100D run on?
The Magnum MMG100D runs on Diesel.
How much oil does the Magnum MMG100D take?
The Magnum MMG100D has an engine oil capacity of 15.5 liters (16.4 US quarts), per the manufacturer specification sheet.
What is the prime power rating of the Magnum MMG100D?
The Magnum MMG100D is rated 78 kW prime (98 kVA), against 86 kW standby.
What is the sound level of the Magnum MMG100D?
The Magnum MMG100D is rated at 68.0 dBA at 7 m, per the manufacturer specification sheet.
What is the dry weight of the Magnum MMG100D?
The Magnum MMG100D has a dry weight of 1714 kg (3778 lb).
How big is the fuel tank on the Magnum MMG100D?
The Magnum MMG100D has a 624.8 liter (165 US gallon) fuel tank, giving about 24 hours of runtime.
What voltages is the Magnum MMG100D available in?
The Magnum MMG100D is offered in 120/240 V, 120/208 V, 277/480 V, 3-phase.
What size battery does the Magnum MMG100D need?
The Magnum MMG100D uses 1 battery, 720 CCA, per the manufacturer specification sheet.
What alternator does the Magnum MMG100D use?
The Magnum MMG100D uses a Marathon 363PSL1607 (1661) alternator. Insulation class H.
What oil filter does the Magnum MMG100D use?
The Magnum MMG100D uses oil filter part number 100-030.
What fuel filter fits the Magnum MMG100D?
The Magnum MMG100D uses fuel filter part number 100-045.
Which air filter part number does the Magnum MMG100D take?
The Magnum MMG100D uses air filter part number 100-025.
Troubleshooting
10Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Low fuel level shutdown | Fuel level low; fuel tank leaks; fuel level sender or connecting wiring damaged | Check the fuel level on the LCD window and confirm the generator is sitting level; check for leaks in the fuel tank; check the fuel level sender and the connecting wiring for damage and check for continuity between the sender and the engine controller |
| Low oil pressure shutdown | Engine oil level low; oil leaks; loss of oil pressure; oil pressure sender faulty | Check the level of the engine oil with the dipstick and add oil if required; visually inspect the engine for oil leaks; restart the unit and verify the loss of oil pressure, shutting the engine down immediately if the oil pressure value does not read five (5) psi (34 kPa) within five (5) seconds; check the oil pressure sender and refer to the troubleshooting section of the engine operation and maintenance manual |
| Low coolant level shutdown | Coolant level low; coolant leaks in hoses, engine block or water pump; coolant mixed with engine oil | Allow the engine to cool; check the coolant level in the radiator and add coolant until it is 3/4 in (2 cm) below the filler neck, then secure the radiator cap; inspect coolant hoses, engine block and water pump for visible leaks; check the engine oil to verify no coolant has mixed with it and consult the engine operation and maintenance manual |
| High coolant temperature shutdown | Coolant level low in overflow jug; radiator shroud and ducting blocked; coolant leaks in hoses, engine block or water pump; serpentine drive belt for the water pump loose; engine overheating | Check the coolant level in the overflow jug; restart the engine and read the coolant temperature to verify High Coolant Temperature Shutdown, stopping the engine immediately if the coolant temperature is 230°F (110°C) or more; allow the engine to cool, add coolant to the overflow jug if low and check the radiator level, adding coolant until it is 3/4 in (2 cm) below the filler neck and securing the radiator cap; check the radiator shroud and ducting for blockage and remove any foreign matter; inspect coolant hoses, engine block and water pump for visible leaks; check the tension of the serpentine drive belt for the water pump; if no other problems are found, remove the load on the generator and restart the engine, checking the coolant temperature and shutting the engine down immediately if it starts to overheat, and consult the engine operation and maintenance manual |
| Overcrank shutdown | Fuel level low; fuel pump not operating properly; air filter blocked; engine will not start | Check the fuel level in the tank; check for proper operation of the fuel pump; check air filter for blockage; if the engine will not start, consult the engine operation and maintenance manual for additional information on troubleshooting starting problems |
| Overspeed or underspeed shutdown | Frequency above or below 60.0 Hz with no loads on the generator (engine speed requires adjustment) | Disconnect all loads and restart the generator, read the frequency (Hz) on the LCD display (should read 60.0 Hz with no loads); if the frequency is above or below 60.0 Hz, adjust the engine speed — see the engine manual for throttle adjustments on mechanical governed units and the electronic governor manual for electronically controlled units |
| Low fuel level shutdown | Fuel level low; leaks in the fuel tank; fuel level sender and connecting wiring damaged | Check the fuel level on the Home screen and confirm the generator is sitting level; check for leaks in the fuel tank; check the fuel level sender and the connecting wiring for damage and check for continuity between the sender and the engine controller |
| Low coolant level shutdown | Coolant level low; leaks in coolant hoses, engine block or water pump; coolant mixed with engine oil | Allow the engine to cool; check the coolant level in the radiator and add coolant until it is 3/4 in. (1.9 cm) below the filler neck; inspect coolant hoses, engine block and water pump for visible leaks; check engine oil to verify no coolant has mixed with it and consult the engine operator's manual |
| High coolant temperature shutdown | Coolant level low in overflow jug or radiator; radiator shroud and ducting blocked; leaks in coolant hoses, engine block or water pump; serpentine drive belt tension incorrect; generator overloaded | Check the coolant level in the overflow jug; restart the engine and read the coolant temperature, stopping the engine immediately if the coolant temperature is 230°F (110°C) or more; allow the engine to cool, add coolant to the overflow jug if low and check the radiator level, adding coolant until it is 3/4 in. (1.9 cm) below the filler neck; check the radiator shroud and ducting for blockage and remove any foreign matter; inspect coolant hoses, engine block and water pump for visible leaks; check the tension of the serpentine drive belt for the water pump; remove the load on the generator and restart the engine, checking the coolant temperature and shutting the engine down immediately if it starts to overheat |
| Overspeed or underspeed shutdown | Engine speed above or below 60.0 Hz | Disconnect all loads and restart the generator and read the frequency (Hz) on the LCD display; if the frequency is above or below 60.0 Hz, adjust the engine speed per the engine operator's manual for throttle adjustments on mechanically governed units and the electronic governor manual for electronically controlled units |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
6| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 100-025 | Air Filter | 1 | Air filter | Amazon eBay |
| 100-030 | Oil Filter | 1 | Oil filter | Amazon eBay |
| 100-045 | Fuel Filter | 1 | Fuel filter | Amazon eBay FridayParts $20.19 |
| 100-060 | Coolant Filter | 1 | Coolant filter | Amazon eBay |
| 100-085 | Belt | 2 | Belt | Amazon eBay |
| 100-100 | Spark Plug | 1 | Spark plug | 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 | 23.5 | 6.2 | |
| Prime | 50% | 11.7 | 3.1 |
| Prime | 75% | 17.8 | 4.7 |
| Prime | 100% | 23.5 | 6.2 |
| Standby | 18.1 | 4.78 | |
| Standby | 100% | 18.1 | 4.78 |
Available documents
Spec sheet — Generac Towable Diesel Generator - MMG100D Specs (Magnum)Reference — MMG75D-100D-Ops-03-15-13-32668-B (Magnum)Service manual — 32668 (Magnum)
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.