My go to tool for this is my Starrett 5/16” pin punch. If that doesn’t do it, then tap the bushing a few turns with a 5/16 tap. Screw in a bolt and tap it out by tapping on the bolt from above.
This is assuming, of course, that you have the powerhead removed, shift rod disconnected, lower unit removed from the midsection, gearcase drained, skeg removed from the gearcase and all the internals out of it.
-Ben