greetings,

it is a kawasaki xi 750 ss 1994. The jet ski on the water does not go over 5500 rpms. It works without problems on a trailer with connected water. I cleaned the carburetors, the reservoir, measured the compression, which has 150 psi on both pistons. The propeller was also checked, everything is ok. All electricity seems to be good too. As soon as it enters the water for the first few meters, it has full power, and the assumption is that when it fills the water system, something chokes it.
P.S. It runs fine on 5.5k rpms, you can still drive it, but everybody needs the full power haha