Hello all. I was given a 4hp outboard or atleast i was told it was 4hp lol. I am having a problem decoding the serial to figure out what year and actual HP it is. The tag shows me 2 sets of #'s one being T-63-9-10A and the other is 6340210. I also found a # on the lower part that read 12725. Hopefully this will make sense to someone. It does have a top mounted fuel tank but can also run off an external tank. Any and all help would be greatly appreciated from those of you who have more knowledge on these motors then I do.