Fitment:Zenith Carburetor for Lincoln pipeline Style Welders.Lincoln SA-200 and gas SA-250 with F-162 and F-163 Continental engines that have eletric solenoid type idlersLincoln WELDER 200 AMP, WELDER 250 AMP Part Numbers:13713B0-13713 Specification:MOUNTING STUD SPACING : 2-3/8” CENTER TO CENTERTHROAT SIZE : 1”AIR INLET ID : 1-3/8”AIR INLET OD : 1-5/8” Package Including:1 x Carburetoras the pictures Note:* Please clean up the oil channels and air filters as well as use the clean fuel before installing the carburetors* Please confirm your old part number matches up with one of the part numbers above* Professional installation is highly recommended