I was given a newer looking yami f80 4 stroke.....no lower unit.
I read online tha f75-f100 are all the same.
Would any 2 stroke lower units be a direct bolt on?
some 1999 to 2004 75,80,90, & 100s should interchange ,
check the parts numbers of different motors to see which ones are the same
It would help to know what the motor model is