So far I haven't had much luck tracking down a Magnus Anderson Blixhavn b. 1882. One possibility is an Albert Mandius Blikshavn b. 1882 who d. after 1902 according to the entry under his parents on Dale bnr. 8 at http://www.slektsforumkarmoy.no
Apparently they lost track of him after then, so he might have come to America. I have sometimes seen Magnus and Mandius interchanged, don't know how common it was. This one is listed in the 1901 census under the name Mandius Andersen Blixhavn on the Blixhavn farm (under the Dale farm in both the printed and online bygdebok). His parents were Anders Helgesen Blikshavn and Anna Marta Andersdatter Øvrebø.