This sale is for a rebuilt original cast iron updraft Zenith 161 carburetor with a 2-1/4" center to center mounting bolt pattern. Carburetor has been taken completely apart and sonic cleaned and bead blasted inside and out. All passages have had correct bits run through them and blown out. New throttle shaft and butterfly as well as float, float valve, float pin, choke shaft and butterfly, all jets and adjustments, screws and gaskets installed. These carburetors are a very universal and versatile carb. By adding a large main jet and a high speed load adjustment, this carburetor can be used on all Wisconsin engines having a 2-1/4" bolt pattern, ie 2 and 4 cylinder engines like TH, TJ, VD, VE, VF and VH model engines. The original carbs were fixed jetted for each model engine, but by doing what I have done can be used for any size horsepower engine that will accept this mounting pattern. Also, the choke control arm and stop on these can be reversed and put in any position to fit your application. Comes with mounting gasket as well. Please see pictures and ask questions if you have them. We describe our items as accurately as possible. We do not know everything, so look at the photos as well as reading description completely and ask questions if you have them. I will ship internationally and will combine shipping on multiple purchases.