17 Kawasaki STX 15-f over heating with a different problem part2

Ok we came across two jet ski same year same model. And also same problem. Both were over heating but different issues. One is all the cooling hoses were clogged up with sand that I just explain in the video. And this other one same problem over heating but a different issue. We found out that the Water Log is cracked. Also the Exhaust Manifold has two holes on sides. Thank you hope this can help you. Good luck!