Gentlemen, finally had some time to take the ole 16' Tahiti out to Saguaro last friday. First time out since ihave kindof learned what i'm talking about in the jet boating world. Ran real good, at 4500 rpm was doing 48 mph on the handheld GPS, so it's not to bad. Didnt want to rev the 455 any higher till i do the oil modifications. I imagine after i rebuild the pump i will pick up some MPH.the leading edges on the impellar are pretty chewed up and i can feel some radial movement on the shaft so i'm sure the tail bearing has seen beter days along with the wear ring. All charging system issues are taken care of thanks again to all the people who put their .02 in. how much mph do yall think i will gain with a fresh pump?