What did you have in the boat for a load?? How many people??
That boat should be ok with 2 guys, 3 guys maybe. Trim the motor down then get up on plane. Trim up slowly to find where top speed is. There will be a sweet spot you just have to find it. Then you can start to throttle back.
I just leave mine in one spot. It costs me 1mph on the top end and it dont plane real fast but it is easier.