Folks have had this ski for 8 years, never a problem, last weekend it ran fine then the kids started doing 360's and it would die, it would restart but would not go, just idle...after a minute or so idling it would run fine, then after doing some hard turns or jumping big wakes it would do the same thing..idle but would not accept throttle, after idling for a while it would run fine. any ideas on where i should start to trouble shoot?