Abstract: A rotary mower is supported from the three-point hitch of a tractor with the rear ends of the lower arms of the hitch pivotally attached to opposite sides of the forward portion of the mower and the mower includes a rigid standard with the upper arm of the three-point hitch anchored relative to the upper end of the standard by means of a flexible adjustable length tension member, the rear portion of the mower including dirigible ground engaging support wheel structure. The flexible tension member comprises a length of link chain including front and rear anchor structures for releasable anchoring relative to the upper arm of the three-point hitch and the upper end of the standard, the front and rear anchor structures including double and single clevis assemblies for adjustable anchoring to selected longitudinally spaced portions of the link chain.