Just bought my first boat and it came with a 50 hp Yahama jet motor. It starts up fine. I haven't checked to see if it "pee's" water right yet because I haven't had it on the water. The guy I bought it from took good care of it, but he hasn't used it in a while and it has been sitting a long time. What all should I check and do to it before I take it out and start using it alot?