97 gtx problem after problem

[Roy780]

Ok guys I'm back again . Ready to just sink it in the bottom of the river. I have done everything jetski a I'll won't go over 20 mph and revs from 3000 to 7000 when u hold throttle down. I've replaced all fuel lines fuel valve rebuilt carbs and wear ring . It ran good for 30 mins . Now it just boughs back down.

 

[Mraw]

Did you replace the o ring on the fuel filter?

 

[Mraw]

To test you could bypass it and see if your issue goes away

 

[Tyman2020]

Did you use genuine mikuni carb kits? Did you check pop-off to see if the carbs are done correct.

 

[GGuillot]

I've replaced all fuel lines fuel valve rebuilt carbs and wear ring . It ran good for 30 mins . Now it just boughs back down.

What was the pop off on each carb? I'm assuming you rebuilt them using the genuine kits, which would run you about $125. New oem needle/seats?