Abstract: A blade-mounting system for a rotary mower includes a platform operatively connected in driven relationship with a drive axle of the rotary mower. The platform includes a pair of raised edges spaced from one another and disposed on opposite sides of the platform and a plurality of upstanding lugs projecting from the platform and between the pair of edges with at least one of the upstanding lugs including a transverse hole extending through the lug. A blade is adapted to be disposed adjacent the platform and between the pair of raised edges. The blade includes apertures corresponding to the plurality of upstanding lugs such that the lugs are received through the apertures in the blade. A fastener is adapted to be received through the transverse hole in the at least one upstanding lug so as to removably mount the blade in adjacent relationship to the platform and between the pair of raised edges.