I think its a 90 something, great shape runs good pumps water I tried to post a pic but it didn't go. I bought it for my lake boat but found a 4 stroke and put that one on instead.
I have 2 older metal cases marlin and 10a riggers for parts don't know they might even work. $100 for the pair pick up in mexico bay or Oswego area.
http://s45.photobucket.com/user/empty_hook/media/riggers_zpsc81e50c2.jpg.html
looking to get my 25 foot crestliner repowered. it has a 4.3 v6 merc in it now thats been rebuilt once. tired of all the problems with it. who would you recomend for doing the work and motor from?