Greetings,i was just given a simplicity 17 hp Kawasaki liquid cooled landlord ,by a friend the tractor has 365 hours on it ,it is vary clean and always been stored inside ,it has a hydro problem, when driving it has a surge to it ,as if you are going from fast to slow on the throttle it still moves forward and back, the belt does seem vary loose I have a new one on order but have a feeling that it is a trans problem and not just a slipping belt, I know these tractors were only made for a short period of time would this tractor be worthwhile spending the money on a good used transmission , seeing that I have zero into it tractor itself is very nice with a 50 inch deck I would like to maybe find a snowblower for it ,is there any way to ad oil to this hydro it looks like a sealed units don't have the owners book for it yet, any comments on on things I should check be appreciated ,thanks