Hello. I have a 1986 20 ft. aquasport with a 1986 90hp Envinrude. I also have a 120hp 1990 Evinrude that I want to out on in place of the 90hp. What problems, if any, will this cause?? Is the engine too big, will it be an easy switch since their the same type? Will the mounting holes be in the same place??<br /><br />Any information would be greatly appreciated.<br /><br />Thanks
