An aerator hole spacing control (102) with a hydrostatic traction drive including a pump (132) and a plurality of wheel motors, a control arm (148) mounted on a control shaft (150) of the pump (132) that controls the direction and the speed of the pump (132), and a cam follower (144) on the control arm (148) that contacts a cam surface (134) having a minimum coring speed position, a maximum coring speed position, and a transport position. The cam surface (134) linked to an operator speed control (120) that moves the cam surface (134) to determine where the cam follower (144) contacts the cam surface (134) to change the speed of the pump (132) between the minimum coring speed position and the maximum coring speed position without stopping the pump (132).
