I had a 192. Great Boat. I had a 150 and that seemed to be the average power for the boat. It is rated for 200. Puzzled why anyone would put a 115 on it.
However, sea trial it. The boat seats 8 . I would get 5 or 6 of your friends or family on it and sea trial it with a load and that will tell you if 115 is enough.