This listing is for a balancer stub shaft, John Deere part #M70186.  It was removed from a John Deere F525, serial #120973 with a Kawasaki PA540A-AS01 17hp engine.  It may fit other models as well.  If you are not sure if it will work on your mower then please ask.  It is in nice condition.  Payment by paypal within 2 days of the auction's close.  I will combine shipping on multiple purchases when possible.  If you are looking for a part that I don't have listed please ask, I might have one.  Thanks for looking!