Hi guys I just rebuilt the top half of my engine and got the 10 hour break in period completed. When I took it out today it started right up but needed an adjustment on the hi speed fuel mixture screw because the engine wouldn't go over 4k rpm. I did this and the motor ran for about 20 minutes reaching 6.5 k rpms. The speed of the jet ski was good but it felt sluggish and didn't have the same power comming out of hard turns. So I adjusted the screws with an 1/8. turn on screw, after that I was unable to get my motor to start and run again. Just was looking for some ideas why the engine would start and run but after a little adjustment on the mixture screw it wouldn't start at all??? I even tried resetting the mixture screws to factory settings but that didn't work either. Thanks