A rotary cutting deck height of cut adjustment mechanism includes a front pair of height of cut arms and a rear pair of height of cut arms, each height of cut arm pivotably mounted at an angle to a rotary cutting deck. A height of cut rod extends between a front height of cut arm and a rear height of cut arm on each side of the deck. A height of cut adjustment screw is rotatable to extend or retract each height of cut rod. A linkage is provided between the pair of height of cut adjustment screws, so that the angle of the height of cut arms may be adjusted from a single point.