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Generac — Overloading a generator in excess of its rated wattage

For these Generac models: 389/206/163cc, 410cc, GP1800, GP3250, GP5000, GP5500, GP6500, GP7000, GP8000.

Applies to: Generac Gp1800, Generac Gp3250, Generac Gp5000, Generac Gp5500, Generac Gp6500, Generac Gp7000, Generac Gp8000

Procedure

  1. Add up the total wattage of all electrical devices to
  2. The rated wattage of lights can be taken from light
  3. If the appliance, tool or motor does not give watt­
  4. Some electric motors, such as induction types,
  5. Figure the watts needed to start the largest motor.
  6. Add to that figure the running watts of all other con­
  7. Remove cover from end of alternator assembly.
  8. Remove two screws holding down the voltage regulator
  9. Leave AVR connected to stator and brushes
  10. Set VOM to measure AC voltage.
  11. Connect VOM across a 240VAC socket as shown in

Source: manual:GP Series Service 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.