A wheel mounting and height adjustment mechanism for use with a power equipment unit/implement such as a lawn mower. In one embodiment, the mechanism may include a block defining a plurality of bores, each bore to selectively receive an axle of a wheel assembly. A plate member may be provided in or near the block. The plate member may include a plurality of elongate cutouts such that a separate cutout is selectively alignable with each of the plurality of bores. When the plate member is in a disengaged position such that a first portion of each cutout is aligned with its respective bore, each cutout permits the axle to fully enter its respective bore. However, when the plate member is moved to an engaged position, each cutout may engage the axle to capture the respective wheel assembly.