Re: Wedges?
If when you say "wedges behind it", you're saying that the engine has tapered wedges installed between the transom brackets and the boat transom........
Wedges of that sort are needed on some engines/boats to compensate for the angle of a transom. Various boat manufactures in the past did manufacture boats whereas the outboard engine could not obtain the proper angle of attack.... the wedges solved that problem.
You don't say what year the 115 or the 140 is BUT to my knowledge, their angle of attack setup has always been the same.... so I would assume that the wedges should be reinstalled.