I have a 09 Ski Nautique 196. It vibrates when pulling up heavier skiers (170 lbs +). It goes away after the initial get up, but it is considerably noticeable. It is weird, as there is no vibration when normal throttling the boat to plane or when pulling up the wifey at 125 lbs. I assume the prop is the first place to start and have it reconditioned or could it be something else ? Anyone had this issue before ?