Specifications
| Frequency | 60.0 Hz |
|---|---|
| Standby power | 1000 kW |
| Standby kVA | 1250 |
| Prime power | 900 kW |
| Emissions | 2 |
| Controller | DSE 8610 |
| Oil capacity | 200.0 L |
| Alternator | Marathon 741RSL8045 (Class H insulation) |
| Voltage options | 277/480 V |
| Phase | 3 |
| Rated current | 1503 A |
| Power factor | 0.8 |
| Battery group | 8D |
| Battery cranking | 1100 CCA |
| Battery voltage | 24 V |
| Battery quantity | 4 |
| Fuel tank | 5148.0 L |
Engine
| Oil capacity | 200.0 L |
|---|---|
| Coolant capacity | 288.0 L |
| Displacement | 37.11 L |
| Aspiration | Turbocharged |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Mitsubishi S12H-Y2PTAW-1| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Dry | — | find | ||
| Fuel filter | Cartridge | ×4 | — | find | |
| Oil filter | Cartridge | ×5 | GM13942 | Amazon eBay $25.00 PartsGeek | |
| Belt | — | find | |||
| Coolant | Demineralized water or distilled water, 40-60% anti-freeze based on a theoretical temperature that is 9-18°F (5-10°C) below the lowest temperature expected in the area | — | |||
| Oil | 200.0 L | — | 30 hr |
Common questions
What is the power rating of the Generac MCG1000MT2?
The Generac MCG1000MT2 is rated 1000 kW standby (1250.0 kVA).
What engine does the Generac MCG1000MT2 use?
The Generac MCG1000MT2 is powered by the Mitsubishi S12H-Y2PTAW-1 engine.
What is the oil capacity of the Generac MCG1000MT2?
The Mitsubishi S12H-Y2PTAW-1 engine in the Generac MCG1000MT2 has an oil capacity of 200.0 liters.
What alternator does the Generac MCG1000MT2 use?
The Generac MCG1000MT2 uses a Marathon 741RSL8045 alternator. Insulation class H.
Troubleshooting
15Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Engine Cranks But Will Not Start | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| Engine Will Not Crank (Electric Start) | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| Engine Starts But Will Not Run Smoothly | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| Engine Overheats | Refer to engine manual or contact Generac Mobile Products Technical Service. | |
| No Output Voltage | Circuit breaker tripped or failed Internal failure of alternator | Reset or replace circuit breaker. Check electrical connections. |
| High Output Voltage | Excessive speed | Verify engine RPM. Check AVR adjustment. |
| Low Output Voltage | Incorrect speed | Verify engine RPM. Check AVR adjustment. |
| Electrical Shock When Frame Is Touched | Static charge Grounded armature or field coil. | Ground unit frame at local reference ground. Contact Generac Mobile Products Technical Service. |
| Mechanical Noise | Internal failure of alternator Loose flexplate Engine fan or belts issues | Contact Generac Mobile Products Technical Service. Tighten flexplate to flywheel and alternator shaft. |
| Low Fuel Level Shut-down | Low fuel level Unit not level Fuel tank leaking Damaged fuel sender or wiring | Check fuel level in LCD window of controller. Confirm that unit is sitting level to ensure an accurate reading. Check tank for leaks. Check for continuity between sender and engine controller. (Refer to DC wiring diagram.) |
| Low Oil Pressure Shut-down | Low oil level Oil leaking from engine Oil pressure sender | Check oil level on dipstick. Add oil, if needed. Visually inspect the engine for leaks. Restart unit and verify loss of pressure. Shut down immediately if pressure does not reach 5 psi (34 kPa) within five seconds. Refer to engine operator’s manual to identify corrective action. |
| Low Coolant Level Shutdown | Low coolant level Coolant hoses leaking Engine block or water pump leaking | Allow engine to cool, then check coolant level in radiator. Add coolant, if needed. Inspect hoses for leaks. Repair or replace as necessary. Visually inspect for leaks. Check engine oil to verify no coolant has mixed with the oil (oil will appear milky). Refer to engine operator’s manual for additional information. |
| High Coolant Temperature Shutdown | Low coolant level Blockage in radiator Leakage in coolant hoses, engine block, or water pump | Add coolant if needed. Allow engine to cool, then check coolant level in radiator. Restart engine and check coolant temperature (on controller). Stop engine immediately if coolant temperature is 210°F (99°C) or more. Check radiator shroud and ducting for blockage and remove any foreign matter. Inspect for visible leaks. Check tension of water pump serpentine drive belt. Remove load on generator and restart engine. Check coolant temperature and shut engine down immediately if it starts to overheat. Refer to the engine operator’s manual for additional information on engine overheating. |
| Overcrank Shutdown | Fuel level low Check fuel level in tank. Check fuel pump operation. Check air filter for blockage. | Refer to engine operator’s manual for additional information. |
| Overspeed or Under-speed Shutdown | Frequency setting incorrect | Disconnect all loads and restart unit. Read frequency (Hz) in the LCD window on controller. Frequency should read 60 Hz. If frequency is above 60 Hz, engine speed will need to be adjusted. Refer to the engine operator’s manual for throttle adjustment information. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
15| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 01865 | Fuel/Water Filtering System | Fuel filter | PartsGeek | |
| 18650 | Oil filter | PartsGeek | ||
| 01858 | Engine Oil Recommendations | Service part / kit | PartsGeek | |
| 01859 | Serial Number Locations | Service part / kit | PartsGeek | |
| 01860 | GFCI Receptacle and Interior Light Timer | Service part / kit | PartsGeek | |
| 01861 | Component Locations - Left Side | Service part / kit | PartsGeek | |
| 01862 | Component Locations - Right Side | Service part / kit | PartsGeek | |
| 01863 | Control Panel | Service part / kit | PartsGeek | |
| 01864 | Digital Controller | Service part / kit | PartsGeek | |
| 01866 | Parallel Setup and Operation | Service part / kit | PartsGeek | |
| 01867 | Generator Output Connections | Service part / kit | PartsGeek | |
| 01868 | Voltage Regulator | Service part / kit | PartsGeek | |
| 01870 | Transfer switch operation manual | Service part / kit | PartsGeek | |
| 01871 | Maintenance schedule and basic maintenance tasks for MCG1000MT2 | Service part / kit | PartsGeek | |
| 01873 | Maintenance schedule and extended maintenance tasks for MCG1000MT2 | 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 | 268.4 | 70.9 | |
| Standby |
Available documents
Operator's manual — 37789 (Generac)