I have a old 1990 SeaDoo Jetski that ran good until today. Took it out and ride over a small wave just outside of the harbor and I lost all drive power. Engine still is solid and driver shaft turns but since I have not disassembled it yet I cannot see what is going on inside the jet pump. I am guessing impeller or something with jet drive but I have never worked on a jet ski before....any suggestions, ideas or help.