Magnum MMG100C Super Start — Specs, Engine, Parts & Maintenance

Name: Magnum MMG100C Super Start Generator Set
Brand: Magnum

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

Cummins/Onan QSB5-G3 NR3

Oil capacity	12.1 L
Displacement	4.5 L
Aspiration	Turbocharged and air-to-air aftercooled
Rated speed	1800 rpm

Maintenance & consumables

for the Cummins/Onan QSB5-G3 NR3

Item	Part #
Air filter	—	find
Fuel filter	—	find
Oil filter	—	find
Belt	—	find
Coolant	—
Oil	—

Common questions

What is the power rating of 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 alternator does the Magnum MMG100C Super Start use?

The Magnum MMG100C Super Start uses a Marathon 362PSL1606 alternator.

Troubleshooting

Symptoms & remedies

Symptom	Cause	Remedy
LOW FUEL LEVEL SHUTDOWN	Fuel level in the tank is low or fuel lines are running dry.	Check and refill the fuel level. Inspect for leaks and check the fuel level sender.
LOW OIL PRESSURE SHUTDOWN	Oil pressure is less than 20 psi (138 kPa).	Check oil level, inspect for leaks, and check the oil pressure sender.
LOW COOLANT LEVEL SHUTDOWN	Coolant level in the radiator is low.	Check coolant level, inspect hoses, engine block, water pump for leaks, and check oil for coolant contamination.
HIGH COOLANT TEMPERATURE SHUTDOWN	Coolant temperature is 230°F (110°C) or more.	Check coolant level, remove any blockages, inspect hoses and components for leaks, check water pump belt tension, and load the unit to prevent overheating.
OVERCRANK SHUTDOWN	Engine will not start.	Check fuel level, fuel pump operation, air filter for blockage. Refer to manual for additional troubleshooting.
OVERSPEED OR UNDERSPEED SHUTDOWN	Engine speed is above or below 60.0 Hz.	Disconnect loads and adjust engine speed as needed based on manual instructions.

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

Part #	Description	Qty	System
100-001	Air Filter	1	Air filter	PartsGeek dieselpartscenter $75.38
100-002	Oil Filter	1	Oil filter	PartsGeek dieselpartscenter $78.44
100-003	Fuel Filter	1	Fuel filter	PartsGeek
100-004	Coolant Filter	1	Coolant filter	PartsGeek
100-005	Belt	2	Belt	PartsGeek kuduparts $239.99
100-006	Spark Plug	1	Spark plug	PartsGeek
100-007	Battery	1	Battery	PartsGeek kuduparts $153.00
100-008	Thermostat	1	Thermostat	PartsGeek
101-4000	Gasket	385	Gasket	PartsGeek
127-0826	Battery	685	Battery	PartsGeek
153-5720	Thermostat	147	Thermostat	PartsGeek
250-0486	Oil Filter	34	Oil filter	PartsGeek
250-0488	Spark Plug	31	Spark plug	PartsGeek
362PSL1606	Generator Model		Generator	PartsGeek
8C-3600	Coolant Filter	375	Coolant filter	PartsGeek
8C-3601	Air Filter	250	Air filter	PartsGeek
8C-3620	Belt	350	Belt	PartsGeek
8C-3627	Fuel Filter	30	Fuel filter	PartsGeek
134277	T70, T90 & T120 Super Quiet Generator Maintenance Schedule		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		6.3	24.0
Standby		6.3	24.0

Magnum MMG100C Super Start Generator Set