Just purchased new Toro Timecutter ZTR, 50 inch deck with Kawasaki 24 hp engine. After engaging PTO, blades started turning but it made a terrible squealing sound. After a quick inspection, I discovered one of the blades was loose. I attempted to tighten but it was already tight. I removed the blade and discovered there was a washer missing. I called the dealer and of course...they didn't have one in stock and will take 3-5 days to get in. I hope this fixes the problem. I did a lot of research on which mower would give me the most bang for the buck. I'm anxious to see if I made a good choice but I'm dead in the water for about a week. Very frustrating...