Is it a stainless prop? I would hope they wouldn't put an aluminum one on there, but you never know.
You'll probably gain RPMs as you raise the motor, and that may dictate more pitch to bring the RPMs back into the power band.
One other thing.....as you set it up, make sure you have the boat loaded like you'll run it on a regular basis. If you dial it in with a super light load, it may fall on it's face when you load it down again, and you'll have to start over on the setup.