Outboard motors (other than OMC brands) usually have vendor supplied magnetos and carburetors. Each are marked by cast in or stamped on identification as to maker and model. Id plate if still on motor would pin down model and year.

If yours is an air cooled motor it is likely one
supplied by Clinton or Eska. Which have a Tecumseh power head assembly.
Numbers stamped in to sheet metal or on a tag contain information
parts counter clerk needs in order to supply correct parts...if available.
Good Luck
Louis