Could I get the displacement of a 1973 40 hp Norseman (Big-twin) , Also a recommended web-site or book like the Johnson 10th edition that has the specs for 70's - 80's omc outboards. thanks kodi
It is 43.9 cubes.-----Just like 40 hp from 1960 to 1970-----Different block starting in 71 and a few changes to lower crank bearing and drive shaft spline depending on the year.
