I recently purchased a 6hp evinrude fisherman and need to know what year this engine is the serial number is 6602B-E03005 it is blue with a white hood that has "fisherman" on the back and "6" on the front with a red and blue "evinrude" on each side.Can anyone verify the year and model and the aproximate value as it is in mint condition and starts and runs smooth. Also what is the proper fuel oil ratio ? I used 50:1 just to make sure it ran.Thanks, Scott