I'am looking to buy a 4stroke,i have a 25hp mariner 2cycle(tiller) on my 15ft boat that i fixed up for fishing it was an 1966 runabout with an old 75 johnson remote on it i replaced it with the 25hp mariner it run 25mph with 1 person and 2 people 24mph with 3 ap.560# 23mph,my question is will a...