I have a old evinrude 40hp motor and wanted a second opinion on the year the model # is 35520 and the serial number is 51053 what I think i figured out is that it is a 1960? What would the fuel mixture be 25/1 ? the man I bought it from says he don't remember what he used he said maybe 25/1 all the reading I did on this forum would suggest 25/1 maybe all the way to 40/1 with a few even suggesting 50/1 but I would think because of age 25/1 would be best?
