Well, after about 10 hours in my new boat, I've come to the conclusion that a 60hp 4-stroke isn't enough power for me -- I find myself running around at nearly wide-open throttle all the time, and that can't be good on the engine. If I drop the power back to 4500 rpm or so, the boat barely stays on plane. Didn't really have any option to upgrade the engine when I purchased, as the boat was "clearance" priced and the dealer just wanted it gone. So I'm thinking of trading up for a bigger engine -- want to stay with a 4-stroke, but not sure whether to go to a 90hp or jump on up to 115hp. I'm hoping the dealer will trade for my nearly-new engine and give me a reasonably good deal but I'm sure I'll still end up taking a bit of a loss on it. So my question is: How much performance increase should I expect if I move from 60hp to 90hp? Enough that I won't have to run around at full trottle all the time just to travel at a reasonable speed? If it's only $1000 or so difference between 90 and 115hp, should I just go for the bigger engine, or is 90 more than enough?