I have some information on a 1960 Scott/McCulloch 12hp outboard with regards to the Carter carburetor. Sears sold Elgin motors made by Scott/McCulloch during late 1950’s to 1960s.
Better information and guidance can be given if you take a picture and post on the forum of the Model/serial plate on the carry handle/
These motors were built by the McCulloch Corporation but since McCulloch had bought out Scott-Atwater in 1956 and retained the Scott name, it can get a bit confusing. McCulloch dropped the Scott and Scott-McCulloch brands in ’63, Firestone in ’59, Wizard in ’64, and both the McCulloch and Elgin lines in ’67 when they went bust.