I am looking to buy a 1999 seadoo gtx rfi jet ski from a local fella, it has low hours 111 or so. Today I took it for a test drive and while acclerating it was hesitating, (kinda cutting in & out) but once I got moving it seemed ok, although I did notice the top speed was only 40 mph. He told me he had the engine rebuilt 3years ago and that he hasnt had it serviced since. Does this sound like something major or minor? I want to buy the ski but at the same time dont want a lemon. Thanks a lot and I hope to be a owner soon!