Generac 0F9719/0F97190SRV/083049 AVR Automatic Voltage Regulator.
If your Generac Generator's output voltage is too high, this is most likely the bad part and it will need to be replaced.
This was used across almost the entire Generac Generator lineup for many years and in many configurations. The older version 083049 has been made obsolete and was replaced by 0F97190SRV. Other part numbers used were F9719, 0F9719, 083049, 83049 and others.
If you have a unit without cooling fins part number 083048, this is a replacement for that regulator as well, however you will need to use a bit longer screws to hold it in place as the cooling fins extend out further. You can still order 083048 (for now), however it's more expensive and does not cool as well.
These (and all Generac Voltage Regulators that are adjustable) do not come from the factory calibrated for the correct voltage! You will need to properly adjust this regulator once it's installed in the unit. This will require a high quality digital voltage meter and a small flat head screw driver.
If adjustments are needed (they almost always are) you will adjust using the small flat head brass colored screw located on the blue potentiometer next to the red LED you see in the picture.
The generator should be running and the frequency should be verified. For older mechanical governor units, the no-load frequency should be set to 62.5 Hz with the front door on and the lid closed. Once that is verified, the voltage regulator should be adjusted so that output is between 245 VAC and 248 VAC. If measuring from line to neutral, the voltage will be half, or 123V to 124V.
For units with electronic governors, verify output frequency (keeping in mind that 5200 series Air Cooled units run at 58 Hz in many cases) and adjust to 240-245VAC or 120-123V if measuring from line to neutral.
Keep in mind that the above voltages are for Single Phase 120/240V systems only!
If you are not comfortable with anything mentioned above, seek a Generac Authorized Dealer to assist with the install and calibration. Dangerous voltages are present when working with generators!
Generac replacement parts will also usually fit the following Generac branded generators: Honeywell, Guardian, Siemens, Carrier, Watchdog, Centurion, & Bryant.
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