I am a little concern now after e-mail the guy last night. I asked about if he had done a compression test and he said no. He said he put a battery in the jetski last night to start it but thinks the starter is bad and will not turn over. Maybe motor locked up? What is the easiest way to check the motor, would it be taking the jet pump off and seeing if you can turn the prop by hand? I am concern about not being able to do a compression test on the motor. I do have a scope that I could put down inside the heads to see what the piston walls look like and the top of the pistons. Thoughts?