I just got a lazer z with 350 hours on it, if you push both levers forward it will go to the left, the right side is faster then the left. seems like an adjustment, the last exmark zero i used did the same thing. from reading people are saying bad motor or pump, this thing has plenty of power and I do not suspect a weak pump. any help would be nice. My manual has a motion control linkage adjustment but its more to set the lever in neutral.