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Generac — Return to Service After Storage

For these Generac models: 004666, 004666-1, 005011, 005011-0, Model 004666, Model 005011.

Applies to: Generac Model 004666, Generac Model 005011

Before you start

  • Do not use tap water in the battery.
  • Damage may occur if the battery is connected incorrectly.

Procedure

  1. Verify that utility power is turned off and that the AUTO/OFF/MANUAL switch is set to OFF.
  2. Check the tag on the engine for oil viscosity and classification.
  3. Verify that the correct recommended oil is used in the engine.
  4. If necessary, drain and refill with the proper oil.
  5. Check the state of the battery.
  6. Fill all cells of unsealed batteries to the proper level with distilled water.
  7. Recharge the battery to 100 percent state of charge, or, if defective, replace the battery.
  8. Clean and wipe the entire generator.
  9. Reconnect the battery, observing battery polarity.
  10. Open the fuel shutoff valve.
  11. Start the unit by moving the AUTO/OFF/MANUAL switch to MANUAL and allow it to warm up thoroughly.
  12. Stop the unit and set the AUTO/OFF/MANUAL switch to AUTO.
  13. Turn on the utility power to the transfer switch.
  14. The generator is now ready for service.

Source: manual:centurion_manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.