94 not running correctly

Hey Guys, I recently bought a pair of 94 seadoo gtx's. One with a 657 and one with a 717. Not sure, but I think the 717 is a added motor later, as I haven't been able to find a 94 GTX with a 717. Both are premix 40-1. Anyway, I checked compassion on both. They were good. Both cyl...