I thought everything was going pretty good in the power department until I tried to pull a wakeboarder this weekend. My boat is a 1985 21' Scarab with Jasper 350, Alpha I drive, and 22P turbo 3-blade prop. My boat runs great at WOT, about 59 on the GPS at 5000rpms. I always thought that it took a little longer to plane off that it should, but pulling a wakeboarder proved it. I had three people in the boat including myself. It took about 30 seconds for the boat to plane off, but once the boat started to plane off and the rpms got over around 3500 the motor pulled really hard and then I'd have to slow down for the guy I was pulling. I know that my boat really isn't designed to pull a skier, but why is the motor down on the midrange power? I pulled the carb off yesterday to rebuild it, and noticed that the previous owner has pinned the secondary throttle blades on the Holley 750cfm 3310 vacume secondary carb. So when the primary blades start to open , so do the secondary blades. I've always noticed a bog when I hit the gas, but I just learned to ease into it and it was fine. I guess I found the cause of the bog, but would that also cause the low midrange power? The carb has 75 jets up front, and the stardard metering plate in the back ( around 78 jet size). I did a WOT runna few weeks ago and noticed that after I stoped and pulled a few spark plugs, they were bone white. Could the lean WOT mixture cause the low power while planing off? What about ignitoin timing, I think right now total advance is around 32 degress, should I bump it up to 34 or 36 and see if that gives the motor any more torque? My buddy has a boat similar in size and power to mine and it will jerk a skier right out of the water and tops off about the same speed as my boat. Thanks for the help, any tips would be great.