Generac MCG1000MT2 troubleshooting: 28 symptom-cause-remedy entries from the manufacturer's own service documentation.
Generac MCG1000MT2 — full specs, parts & maintenance.
| 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 | Reset or replace circuit breaker. |
| No Output Voltage | Internal failure of alternator | 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 | Ground unit frame at local reference ground. |
| Electrical Shock When Frame Is Touched | Grounded armature or field coil | Contact Generac Mobile Products Technical Service. |
| Mechanical Noise | Internal failure of alternator | Contact Generac Mobile Products Technical Service. |
| Mechanical Noise | Loose flexplate | Tighten flexplate to flywheel and alternator shaft. |
| Mechanical Noise | Engine fan or belts issues | Contact Generac Mobile Products Technical Service. |
| Low Fuel Level Shutdown | Low fuel level | Check fuel level in LCD window of controller. |
| Low Fuel Level Shutdown | Unit not level | Confirm that unit is sitting level to ensure an accurate reading. |
| Low Fuel Level Shutdown | Fuel tank leaking | Check tank for leaks. |
| Low Fuel Level Shutdown | Damaged fuel sender or wiring | Check for continuity between sender and engine controller. (Refer to DC wiring diagram.) |
| Low Oil Pressure Shutdown | Low oil level | Check oil level on dipstick. Add oil, if needed. |
| Low Oil Pressure Shutdown | Oil leaking from engine | 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. |
| Low Oil Pressure Shutdown | Oil pressure sender | Refer to engine operator’s manual to identify corrective action. |
| Low Coolant Level Shutdown | Low coolant level | Allow engine to cool, then check coolant level in radiator. Add coolant, if needed. |
| Low Coolant Level Shutdown | Coolant hoses leaking | Inspect hoses for leaks. Repair or replace as necessary. |
| Low Coolant Level Shutdown | Engine block or water pump leaking | 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 | 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. |
| High Coolant Temperature Shutdown | Blockage in radiator | Check radiator shroud and ducting for blockage and remove any foreign matter. |
| High Coolant Temperature Shutdown | Leakage in coolant hoses, engine block, or water pump | 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 Underspeed 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.
Documented causes: Low fuel level; Unit not level; Fuel tank leaking; Damaged fuel sender or wiring. See the table for the matching fixes.
Documented causes: Internal failure of alternator; Loose flexplate; Engine fan or belts issues. See the table for the matching fixes.
Documented causes: Low oil level; Oil leaking from engine; Oil pressure sender. See the table for the matching fixes.