[Cub123Guy]

Just bought my first garden tractor to mow the yard, I have previously always been focused on large ag tractors, we have a few 100 horse JD's we use to farm with. Being I am moving off the farm I decided it was time to buy my own. I bought it at an auction and reinstalled the deck drive belt and put a new battery in it and mowed a little lawn. I have some questions, it tends to freewheel down hill would this be something in the linkage or does the hydro need to be replaced or rebuilt? What should I be looking to spend to fix this? Also the motor seems to bog down a little more than I think it should when I engage the deck and it takes a few seconds for the mower to recover is this ok or normal? I have spun all the pulleys for the mule drive and deck and they seem to turn freely.

Thanks in advance for any advice!