I recently purchased a '96 Jazz boat that is very slow out of the hole. I would like to be able to pull at least a tube or skiier, but that is currently not possible. Engine seems to run well and coming out of the hole it bumps up to about 4500rpm with the throttle wide open, top cruising speed is about 32mph(gps) at 4600rpm. Seems to take about 10-12 seconds to get on plane with just myself and a small child (230lbs Combined) in the boat. If I have any load at all, a hard turn seems to drop me right off plane also. I've inspected the impeller and wear ring, and the clearance is .010 with no significant damage to the impeller or ring. When in forward gear, the cover over the jet has about 1/4" clearance above the jet. I see other jet boats with much more speed on takeoff and maneuverability on turns. Suggestions on what I might be missing here or how to improve?