Hi,
I have a 07 18' Tracker Tundra DC with a 150hp Mercury Opti-Max o/b, I have a 21 pitch 14 5/8 Dia. Tempest Plus Prop on it. By myself with no gear and at wot I am turning 5200 rpm trimmed all the way up and my max speed is approx 51-52 mph gps. This 150 opti's range at wot should be between 5250 and 5750 rpm! I have checked with Tracker and they are telling me that I have the correct prop and the motor is mounted properly which is the second hole from the top. I also have a chine-walking issue which happens at wot loaded or not but mostly when I'm lite. My main concern at this time is to try and get my rpm's into range and my speed up to what it's spec'd out at, the chine-walk issue could possible be related! Can anybody that has the same boat or similar give me any tips that could help me out! By the way I have one other piece of info, the cavitation plate is approx 1" above the bottom the hull. This is the reason I don't just lift my motor a notch. I would like to be sure before doing that, I do not have a water pressure gauge and don't want to take a chance and overheat it!

Thanks,

Al