I have the opportunity to buy 2 Yazoo mowers that are of the 3-wheeled dedicated rider design with a 72" outfront deck. They are both identical and powered by 25hp Kohler engines. I will post model and serial numbers below if you need them. One has 1100hrs, the other 1250hrs. I want to know the positives and negatives of these mowers - mainly mechanically how they hold up. Are they tough? Are the hydro transaxles on them of weak design or tough units? I know these machines are long and hard to haul and look terrible - I don't care about all that. I want to know about their reliability, if they cut well and will they last a long time? Are these 25hp Kohler V-twin motors the ones bad about blowing head gaskets? What (roughly) are these mowers worth? They both seem to run well, pull strong and I engaged the blades and they sounded smooth although I did not get to mow with them. Drive unit information: Model # - both are YTK C25 ser # - 51970583 Deck info: model # - PSR72 Transaxle info: model # - 2006-082 Motor info: model # - CH25S spec # - 68533 ser # - 2507910367 Can I tell from any of the above #'s what year these were produced? Thanks for any information on these you can give.