As a general rule on newer carburetors, for setting Zenith carburetor floats, Zenith's suggestion was that if a new float and new fuel valve were used, the float would be correctly set. However, in 1957, Zenith did publish a guide for VISUAL CHECK ONLY for floats on older carburetors. Here is that list: https://www.thecarburetorshop.com/Zenith_float_settings.jpg Remember, NEVER bend a Zenith float for adjustment. If the dimension is incorrect, then adjust by changing the thickness of the float valve seat gasket. Jon.