Lincoln welder ranger 80 low voltage

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Have low voltage on 120 v output and low voltage at the rod engine running good and brushes are clean Wht can I change plz help
Reply:Have you checked the rpm? I think most of those need to run at 3600 rpm. What is the voltage at the receptacle? Voltage at the welding lug? Sure you have the switches where they need to be for power/ welding?Airco Ac/Dc 300 HeliwelderMillerMatic 200 (stolen)Miller Maxstar 150STLMiller AEAD200LE (welding and generating power

) Hobart MIG
Reply:I have 110 v on bridge rectifier but only 30v on the brushes