How Do I Maintain My Generac Portable Generator?

Portable generator maintenance includes cleaning the exterior of the generator, changing the oil, cleaning the air filter, running the generator monthly, charging the battery, and preparing the generator for storage.

  • Jun 21, 2023
  • Knowledge

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How Do I Maintain My Generac Portable Generator?
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How-Do-I-Maintain-My-Generac-Portable-Generator

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Generac Portable Generator Maintenance



Cleaning the Generator

1. Use a damp cloth to wipe exterior surfaces clean.
2. Inspect cooling air slots and openings on the generator.


Changing the Oil

Most portable generators require an oil change within the first 30 hours, but some smaller generators will require it earlier. Always refer to your generator's user manual for appropriate oil change intervals. See the I Can’t Find My Original Owner’s Manual for My Portable Generator, How Can I Get Another Copy? article.
 
1. Run the generator for a few minutes to allow the oil to heat up and become more viscous with the heat of the engine. 
2. Wait until the engine is cool enough that it can be touched.
3. Remove the oil drain plug.
4. Drain the oil, then replace the drain plug.
5. Refill the crank case with oil to the full line (H). Do not overfill.


Cleaning the Air Filter

1. Unscrew and remove the cover and filter. 
2. Clean the filter with soapy water. 
3. Squeeze with a clean cloth, and keep it flat to dry.


Running the Generator Monthly

It is strongly recommended that a generator is run once monthly for approximately 30 minutes with a load that includes an appliance that uses a motor (such as a box fan). This ensures both the alternator and engine are exercised. 

If running the generator monthly is not possible:
 
  • Run it at least every three months for 30 minutes. 
  • Use a fuel stabilizer.

This ensures the generator's carburetor does not develop issues due to generator non-use.


Charging the Battery

See the How Do I Charge My Electric Start Portable Generator? article for more information.
 

Storing the Generator

See the How Do I Prepare My Portable Generator for Storage? article for more information.


Other Items

  • Check the spark plug gap.
  • Replace the fuel filter.
  • Service the spark arrestor.
  • Perform valve adjustments. It is recommended to contact a certified dealer to perform this task, as improper adjustments could cause damage to the generator. See the How Can I Find a Generac Service Dealer in My Area? article for more information.
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