i have a 1994 sea rayder jet boat with the 90 hp sport jet motor and am having trouble getting up to speed. I max out at about 10-15 mph. It's a new boat to me. I am an experienced machinist but not very knowledgeable yet about jet boats. I saw the impeller was looking pretty rough and the housing was badly worn so I machined a ring to put in the housing which I bored out to fit it. I may have made a big mistake though. The machining all went very well and it fit great with 10-15 thousandths inch gap which should have actually made it better than factory from what I have read. The thing I did that maybe I shouldn't is that I turned the outside of the impeller blades to clean up the ends and maintain that tolerance for the entire length of the blades where they meet the ring diameter. Was this a big no-no? Are factory impeller blades the same distance from the ring at all points of contact?
Is it possible that I threaded the impeller on backwards when re installing it? I'm lost and really want to get this thing running good before summers gone. The boat is mint condition and motor runs great I'm just not sure what it really needs. Any help would be greatly appreciated. Thank you,.....Stan
Is it possible that I threaded the impeller on backwards when re installing it? I'm lost and really want to get this thing running good before summers gone. The boat is mint condition and motor runs great I'm just not sure what it really needs. Any help would be greatly appreciated. Thank you,.....Stan