I see Super Z's for sale on Tractorhouse as old as 2003I'm in abit of a fog here as I can't find where you posted the info we need to help you. The Super Z was introduced in 2011 and since then it came with different engines and deck sizes. How do you expect us to help you with the info you provided? Maybe if you posted unit and engine model and serial numbers it is very hard to come up with a solution, other than it is no longer than 5 years.