I have a 225 Johnson. 21 ft stratos and I have started having some issues getting on plane. When I give it gas the nose comes up RPMS hit about 2500 and stay... If the guy in passenger seat heads toward the front of the boat the nose will fall ill hit plane and the boat runs great... I have been trying to adjust the jack plate to get the most out of the motor and it had ran great the last few times I took it out with this setup. Even ran great on take off last week but after first fish full live wells it started acting up

Does any one know what would cause this or suggestions on what to do?
Thanks in advance!!