Hello everyone, I have a new to me boat that I am a little disappointed in the performance. It is a 1998 Lund Tyee 1950 with a 2014 Mercury 200 HP Optimax Pro XS with a 1.75 gear ratio lower unit. I am running at 6500 to 8000 feet altitude depending on which lake I go to. The problem is I am getting a lot of prop slippage. About 20% and not the top end speed I would expect. I am currently running a Mirage Plus 19 Pitch prop. The RPM's are getting up to 5150 and my top speed is 42 mph if I trim it out. The engine was mounted on the lowest hole, so I raised two holes to start to see if it would do any better. I also just removed all my water logged foam and replaced it this winter so the boat is lighter too. I actually think I lost 1 mph after all this and the prop blows out at full trim now. I expect this boat should do closer to 50-55 mph on the water, but it just doesn't get it done. I have plenty of power to quickly plane the boat, but the last inch and a half of throttle doesn't change anything but the fuel comsumption. I am wondering if I should switch to a 4 blade prop with an 18 Pitch? I have used the online prop calculators, but I just don't know which direction to start with so many options out there. I have heard there are many experts out there to help get you in the ball park of where you should be. I would really like a little more top end speed for traveling down the 60 miles lake I fish on and so I can beat my brother in his boat. LOL. Thanks for any help you can provide.