Voltage Regulator Compatible With Generac Honeywell Guardian Siemens Carrier Watchdog Centurion Eaton Bryant Generator Replace Number ： 81918, 83049, 083049 0830490SRV, 83049GS, SRV83049, F9719, 0F9719, 0F97190SRV The Voltage Regulator Avr automatically keeps your generator’s voltage in check and your engine running well. If adjustments voltage 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. After installing the new voltage regulator, determine if the frequency is correct. Set mechanical governors to 62Hz at no load. Electronic governors set to 60Hz no load. After determining that the hertz are correct, measure the AC output. The voltage should be 124VAC at 62Hz with no load or 120VAC at 60Hz with no load. Replace Number ： 81918, 83049, 083049 0830490SRV, 83049GS, SRV83049, F9719, 0F9719, 0F97190SRV