I picked up an LX255 with problems. I got it running and it goes forward fine and very fast in reverse. The problem is the abrupt stop. When you are going forward and let off the forward pedal it stops....immediately...on a dime. Not in a good "I like a mower that stops quickly" kind of way. More in a throw you over the steering wheel onto the hood kind of way. Same in reverse, when going full speed in reverse if you let off the pedal completely it will stop so abruptly that it literally lifts the front wheels off the ground (not joking). Any ideas what the issue might be?