My buddy has a 201( I think its a 1996) and just had his 200HP Mariner put on it, anyway hes got a 5 blade prop on it now, and is GPS'n at 62MPH. He wants to go to a 24P Tempast Plus prop, what do you guys think he can increase his speed by? 4-5MPH? Don't have the prop to pad measurement either, I asked he didn't know, just lookin to see if this is possible to get him into the 65-68MPH range, thanx!