I have a 2003 gtx supercharge. When the ski is cold and you first launch it, it will idle fine and start up. When you take the rpm over about 2500 a red light comes on with a adibel noise and the display says oil pre. Once you let it warm up for about 10 minutes below 2500 rpm it will run fine all day long. This is a used ski that I puchased and the first 2 trips were no problems. I started having this problem after I took it to the dealer to have the impeler add wear ring replaced.lklinke@sbcglobal.net