My motor makes around 725-750 and I've seen 87 in my boat with just the wife and I and less than a half tank of fuel. The water was perfect and it wasn't a super hot day. I actually might be able to squeeze a touch more out of it cause when I returned that day my transom was a little black from running rich, but I'd rather have running a little rich cause it's safer than leaning and trying to get every last MPH out of it. I see a consistent 84 almost any day of the week! I would love to see 90 once but I think I'm going to need allot more power to hit that mark so I think a blower may be in my future
The best part about running that number that day was a guy was running his mouth about how fast his Sunsation was, and told me my boat was a heavy pig that wouldn't move it's own a$$ out of the way. He left about 20 minutes before me and waited for me to leave so when I got out there I put it on him. My wife was egging me on, so I shut him up