Generac Power Systems MDG25IF4 User Manual (English)

Questions and Answers:

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James SchultzAug 14, 2025
What to do if my Generac Power Systems MDG25IF4 Portable Generator has a high coolant temperature shutdown?
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  Lauren HuangAug 14, 2025
  If your Generac Power Systems Portable Generator shuts down due to high coolant temperature, first add coolant if needed. Then, check the radiator shroud and ducting for any blockages and remove any foreign matter. Finally, inspect for visible leaks in the coolant hoses, engine block, or water pump, and check the tension of the water pump serpentine drive belt. Remove the load on the generator and restart the engine.
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Lance Wong MDAug 17, 2025
How to fix low fuel level shutdown on Generac Power Systems MDG25IF4?
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  shawnwilsonAug 17, 2025
  If your Generac Power Systems Portable Generator shuts down due to low fuel, check the fuel level in the LCD window of the controller. Also, confirm that the unit is sitting level to ensure an accurate reading. Check the tank for leaks and check for continuity between the sender and engine controller.
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Dorothy HarmonAug 21, 2025
What to do if my Generac Power Systems Portable Generator has a low oil pressure shutdown?
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  Dylan ChandlerAug 21, 2025
  If your Generac Power Systems Portable Generator shuts down due to low oil pressure, check the oil level on the dipstick and add oil if needed. Visually inspect the engine for leaks. Restart the unit and verify loss of pressure; if pressure does not reach 5 psi (34 kPa) within five seconds, shut down immediately. See the engine operator’s manual to identify corrective action.
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george07Aug 25, 2025
What to do if my Generac Power Systems MDG25IF4 has a low coolant level shutdown?
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  tiffany26Aug 25, 2025
  If your Generac Power Systems Portable Generator shuts down due to low coolant level, allow the engine to cool, then check the coolant level in the radiator and add coolant if needed. Inspect hoses for leaks, repairing or replacing them as necessary. Visually inspect the engine block or water pump for leaks. Verify no coolant has mixed with the engine oil (oil will appear milky). See the engine operator’s manual for additional information.
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Joyce HollowayAug 28, 2025
What causes overcrank shutdown on Generac Power Systems Portable Generator?
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  mark21Aug 28, 2025
  If your Generac Power Systems Portable Generator experiences an overcrank shutdown, check the fuel level in the tank, check fuel pump operation, and check the air filter for blockage. See the engine operator’s manual for additional information.
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Brian CarterAug 31, 2025
Why does my Generac Power Systems Inverter shut down due to low fuel?
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  William Mitchell DVMAug 31, 2025
  Your Generac Power Systems Inverter might be shutting down because of a low fuel level, the unit not sitting level, a leaking fuel tank, or a damaged fuel sender or wiring. You can check the fuel level in the LCD window of the controller. Also, confirm the unit is level to ensure an accurate reading, and inspect the tank for leaks. Finally, check for continuity between the sender and engine controller.
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Eric GomezSep 3, 2025
What to do if my Generac Power Systems Inverter has a high coolant temperature shutdown?
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  kelsey94Sep 4, 2025
  If your Generac Power Systems Inverter experiences a high coolant temperature shutdown, it could be due to a low coolant level, a blockage in the radiator, or leakage in the coolant hoses, engine block, or water pump. Allow the engine to cool, then check the coolant level in the radiator. Check the radiator shroud and ducting for blockage and remove any foreign matter. Inspect for visible leaks.
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Jessica DurhamSep 7, 2025
What causes a low oil pressure shutdown in a Generac Power Systems Inverter?
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  Carol AlvaradoSep 7, 2025
  A low oil pressure shutdown in your Generac Power Systems Inverter can be caused by a low oil level, oil leaking from the engine, or an issue with the oil pressure sender. Check the oil level on the dipstick and visually inspect the engine for leaks. Restart the unit and verify the loss of pressure. Shut down immediately if the pressure does not reach 5 psi (34 kPa) within five seconds.
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Daniel EllisSep 10, 2025
What causes an overcrank shutdown on my Generac Power Systems Inverter?
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  Erin TravisSep 10, 2025
  An overcrank shutdown on your Generac Power Systems Inverter can be caused by a low fuel level or a blocked air filter. Check the fuel level in the tank and check the air filter for blockage.

Generac Power Systems MDG25IF4 Specifications

General

Model	MDG25IF4
Type	Portable Generator
Power Output	25 kW
Fuel Type	Diesel
Starting System	Electric Start
Voltage	120/240V
Frequency	60 Hz
Phase	Single Phase
Warranty	2 years
Engine Type	4-Cycle Diesel