Re: Crank shaft 1987 110 Evinrude????
All V4 crossflow cranks from 1979 & newer will fit & work. You'll want to match the lower bearing retainer cap with the year of the crank. Later model cranks will have the driveshaft O ring in the bottom plate rather than on the driveshaft itself. If that's what you end up with, simply leave the O ring off the driveshaft. Even if you leave it there it will just get pushed down. No big deal.
What's wrong with your crank?