BnC, the folder is 1968 Evinrude 3hp. I have one just like it. Totally legit. 1968 3hp came with a fiber/plastic hood and fuel pump. The 4hp follows in 1969 with the same set up.
Well, the ’68 Lightwin/JW is a loner motor. The only 3hp with the fiberglass hood and remote tank. Priors were metal integrated tanks and all after that year were 4hp. A folder with case may likely fetch the $750 or more.