i have 1976 johnson 40 hp on a deep v alum starcraft . i can get a 50 hp evinrude 1973 . will that work on this boat. boat not have rate plate i now person who had this for over 20yrs now hes in nurseing home. it sat for 2 yrs he had friend use. where does water shoot out on that model 1973 does it come out muffer exust or threw prop area i had it in water so did see none thanks tom