I'm having a vibration when I put my engine in gear and fist start accelerating, also having a hard time getting on step. Boat is a 24' Bayliner with a 5.0 I/O Alpha 1. Running a 16" pitch prop but didn't have any issues until last weekend when we had a guest aboard and again this weekend with 2 guest. Had to move people around to get weight distributed just right so the boat would get up on step. I'm thinking a 14" pitch prop may fix the acceleration to step issue, but the vibration has me a little worried. Does anyone have any ideas what may be the cause of the vibration?