New to Yamaha

Hello in here everyone. I'm a Yamaha yt6800 virgin. Just bought it on sunday June 7th. its in ecellent shape, but I don't know anything about it. The lady I purchased it from had no idea either. I'm asuming its at least 18 or 20 hp and probably 46" or bigger cut. Can anyone fill me in on these details and any other details that this tractor may have.

Thanks Guys and Gals