I purchased a used Hustler Z that was about 5 years old with only 500 hrs. on it. Not sure why it happened but it blew the seal on the crank bearing/bushing. After my mechanic tore into it he also noticed metal shavings in the oil. He called Kawasaki and explained to them what he found. They told him if I could get the original date of purchase that they would replace the engine with a new one. I thought is was a lost cause since the guy I bought it from had retired and moved. But the stickers were still in good shape and I was able to read them. So I called the place where I was hoping it was purchased from and gave them every serial number I could find. Within minutes they looked it up and gave me the date and the purchaser's name. Still I thought it was still a lost cause. I mean this machine is five years old. But what did I have to loose. My mechanic called Kawasaki with the info and they said I would have a brand new engine in 3-5 days. But they could not pay for the labor to have it put in. WOW no problem!!!! Labor was $48 per hour for 3 hours. Not bad. Kawasaki gets a big thumbs up from me!!!!!!