I have a 1995 seadoo sportster with the 657x. Ran good all season. I replaced the fuel lines with 5/16 line at the begining of the season. I also rebuilt the jet pump. All runs good still until the last day out of the season. I get on the lake and when I give it gas it feel like its not all there. so I shut it off and restart it it runs fine then over revs then shuts down and wont start again. any help would be great.