Service parts for the MMG100C Super Start
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
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 94 kW |
| Standby kVA | 117 |
| Prime power | 82 kW |
| Controller | Magnum Digital (MDC) |
| Oil capacity | 15.5 L |
| Alternator | Marathon 362PSL1606 |
| Voltage options | 120 V, 139 V, 208 V, 220 V, 240 V, 277 V |
| Phase | 1Ø,3Ø |
| Power factor | [1, 0.8] |
| Circuit breaker | 400 A |
| Battery group | Group 24 |
| Battery cranking | 800 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 22.0 L |
| Dry weight | 1475 kg |
| Sound level | 68.0 dBA |
| Fuel tank | 147.0 L |
| Tank runtime | 22 hr |
Engine
| Oil capacity | 12.1 L |
|---|---|
| Displacement | 4.5 L |
| Aspiration | Turbocharged and air-to-air aftercooled |
| Rated speed | 1800 rpm |
Same engine, other brands
2 brandsThe Cummins/Onan QSB5-G3 NR3 in this set also powers 2 generator sets sold under 2 other brands. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Cummins/Onan | DSFAE |
| Terex | T120C |
Maintenance & consumables
for the Cummins/Onan QSB5-G3 NR3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Filter | 100-001 | Amazon Amazon eBay eBay | ||
| Fuel filter | Fuel Filter | 100-003 | Amazon eBay | ||
| Oil filter | Oil Filter | 100-002 | Amazon eBay | ||
| Battery | — | ||||
| Belt | Belt | 100-005 | Amazon Amazon eBay $8.98 eBay NAPA $34.86 | ||
| Coolant | — | ||||
| Coolant filter | Coolant Filter | 100-004 | Amazon Amazon eBay | ||
| Oil | — | ||||
| Spark plug | — |
Common questions
How many kW is the Magnum MMG100C Super Start?
The Magnum MMG100C Super Start is rated 94 kW standby (117.0 kVA).
What engine does the Magnum MMG100C Super Start use?
The Magnum MMG100C Super Start is powered by the Cummins/Onan QSB5-G3 NR3 engine.
What is the oil capacity of the Magnum MMG100C Super Start?
The Cummins/Onan QSB5-G3 NR3 engine in the Magnum MMG100C Super Start has an oil capacity of 12.1 liters.
What is the coolant capacity of the Magnum MMG100C Super Start?
The Magnum MMG100C Super Start cooling system holds 22 liters (5.8 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What is the prime power rating of the Magnum MMG100C Super Start?
The Magnum MMG100C Super Start is rated 82 kW prime (102 kVA), against 94 kW standby.
How loud is the Magnum MMG100C Super Start?
The Magnum MMG100C Super Start is rated at 68.0 dBA, per the manufacturer specification sheet.
How much does the Magnum MMG100C Super Start weigh?
The Magnum MMG100C Super Start has a dry weight of 1475 kg (3251 lb).
What size fuel tank does the Magnum MMG100C Super Start have?
The Magnum MMG100C Super Start has a 147 liter (39 US gallon) fuel tank, giving about 22 hours of runtime.
What voltages is the Magnum MMG100C Super Start available in?
The Magnum MMG100C Super Start is offered in 120 V, 139 V, 208 V, 220 V, 240 V, 277 V, 1Ø,3Ø-phase.
How many cold cranking amps does the Magnum MMG100C Super Start require?
The Magnum MMG100C Super Start uses 1 battery, 12 V each, 800 CCA, group Group 24, per the manufacturer specification sheet.
What alternator comes on the Magnum MMG100C Super Start?
The Magnum MMG100C Super Start uses a Marathon 362PSL1606 alternator.
Which oil filter part number does the Magnum MMG100C Super Start take?
The Magnum MMG100C Super Start uses oil filter part number 100-002.
What fuel filter fits the Magnum MMG100C Super Start?
The Magnum MMG100C Super Start uses fuel filter part number 100-003.
What air filter does the Magnum MMG100C Super Start use?
The Magnum MMG100C Super Start uses air filter part number 100-001.
Troubleshooting
32Fault codes
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| 3 | Battery Flat — If the controller switches off during starting sequence due to bad battery condition, it doesn't try to start again and activates this protection. | ||
| 4 | Binary Input — Configurable warning/shutdown alarms on the inputs of IL-NT. | ||
| 5 | ChrgAlternFail — Failure of the alternator to charge the battery. | ||
| 6 | EmergencyStop — If the input Emergency Stop is opened (pushed in), shutdown is immediately activated. | ||
| 7 | Engine Temp Sd — Water temperature is greater than Sd Water Temp setpoint. | ||
| 8 | Engine Temp Wrn — Water temperature is greater than Wrn Water Temp setpoint. | ||
| 9 | Fgen<, > — The generator frequency is out of limits given by Gen >f and Gen <f setpoints. | ||
| 10 | Fuel Level Sd — Fuel level is smaller than Sd Fuel Level setpoint. | ||
| 11 | Fuel Level Wrn — Fuel level is smaller than Wrn Fuel Level setpoint. | ||
| 12 | GCB fail — Failure of the generator circuit breaker. | ||
| 13 | Igen unbl — The generator current is unbalanced. | ||
| 14 | Low BackupBatt — RTC backup battery is flat. | ||
| 15 | Oil Press Sd — Oil pressure is smaller than Sd Oil Press setpoint. | ||
| 16 | Oil Press Wrn — Oil pressure is smaller than Wrn Oil Press setpoint. | ||
| 17 | Overload — The load is greater than the value given by Overload setpoint. | ||
| 18 | Overspeed — The protection comes active if the speed is greater than Overspeed setpoint. | ||
| 19 | ParamFail — Wrong checksum of parameters. Happens typically after downloading new firmware or changing of the parameter. The controller stays in INIT mode. | Wrong checksum of parameters; happens typically after downloading new firmware or changing of the parameter. | Check all parameters write at least one new parameter. |
| 20 | PickupFault — Failure of the magnetic pick-up sensor for speed measurement. | ||
| 21 | Sd IOM fail — IOM/IGS-PTM module. | ||
| 22 | SprinkIActive — The protection is active if the output Sprinkler is closed. | ||
| 23 | Start failed — Gen-set start failed. | ||
| 24 | Stop fail — Gen-set stop failed. | ||
| 25 | Ubat — Battery voltage is out of limits given by Batt Overvolt and Batt Undervolt setpoints. | ||
| 26 | Underspeed — During starting of the engine, when the RPM reaches the value of Starting RPM setpoint, the starter is switched off and the speed of the engine can drop under Start RPM again. Then the underspeed protection becomes active. Protection evaluation starts 5 seconds after start up. | ||
| 27 | Vgen<, > — The generator voltage is out of limits given by Gen <V and Gen <V setpoints. |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Low Fuel Level Shutdown | Fuel level low; fuel tank leak or tank running dry; fuel level sender and 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 fault. | 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 5 psi (34 kPa) within five 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; visible 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" below the filler neck, then secure the radiator cap; 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 OPERATION & MAINTENANCE MANUAL. |
| High Coolant Temperature Shutdown | Coolant level low; radiator shroud and ducting blockage; visible leaks in coolant hoses, engine block or water pump; loose serpentine drive belt for the water pump; engine overheating. | 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" 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; 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 blockage; 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, requiring engine speed 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. |
| Wet Stacking | Diesel engine run at less than 35% of its full load capacity, causing unburned fuel to accumulate in the exhaust system; can also cause fouling of injectors and buildup on engine valves. | Load the unit heavily for five hours or until the exhaust is clear; diesel engines operate properly when applied loads are between 35% and 100% capacity. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
11| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 100-001 | Air Filter | 1 | Air filter | Amazon Amazon eBay eBay |
| 100-002 | Oil filter | 1 | Oil filter | Amazon eBay |
| 100-003 | Fuel filter | 1 | Fuel filter | Amazon eBay |
| 100-004 | Air Filter | 1 | Air filter | Amazon Amazon eBay |
| 100-005 | Air Filter Element | 1 | Air filter | Amazon Amazon eBay $8.98 eBay NAPA $34.86 |
| 100-006 | Spark Plug | 1 | Spark plug | Amazon eBay |
| 100-007 | Battery | 1 | Battery | Amazon eBay KuduParts $153.00 |
| 100-008 | Bolt (M12-1.75) | 1 | Bolt m12 1 75 | Amazon eBay |
| 125550 | Oil Filter | Oil filter | Amazon eBay | |
| 125551 | Fuel Filter | Fuel filter | Amazon eBay | |
| 125561 | Air Filter - Primary | Air filter | 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 | 6.3 | 24.0 | |
| Standby | 6.3 | 24.0 |