I had a total of 4 people on my boat yesterday with weight around 750lbs and felt a vibration while getting on plane between 2200-2800 rpm. Once the boat was on plane no vibration going straight, turning or raising the trim up/down. Today just 2 people including myself weight of 340lbs and still felt the vibration but much much less..
Any thoughts from anyone

gimble or bearing,good possibility.also check prop shaft and nut