I had a couple brand new ones about 3 years ago. They were the BIGGEST POS's i've ever been involved with. One was a polaris, happened to be the year that Polaris got out of the PWC business - not good. The other one was ok, it was a Kawasaki Ultra150. In 3 years they both had new motors. The brand new one got a new motor the first summer - actually 2 months after we bought it. Seems it didn't like to be flipped upside down?! I dont know. Both did over 70mph with 150hp so i'm sure yours with 250 could go a little faster and definitely get there quicker.
I've come to the conclusion - JetSki's are badass, when they're someone elses