Seeker,
I had put that fin on when the boat had the 150 on it, because I was hoping it would help the listing and increase the speed, it did help both a bit. So I decided to put it on the new power just incase. It does help when trimming and getting the proper angle at WOT. I don't know much about Trim tabs,
but I would think they would decrease fuel effeciency and top end. DUNNO
