a spraying device for dousing the blade chamber of a rotary lawn mower to effect cleaning thereof . an annular , d - shaped conduit is secured to the ground by a centrally disposed stake . the stake orients the flat portion of the d - shaped conduit against the ground , providing a low profile in order for the mower to be positioned over the spraying device . the annular conduit has a plurality of orifices disposed on the top surface defining first and second annular formations . the first annular formation upwardly directs a controlled spray pattern perpendicular to the ground , while the second annular formation upwardly and outwardly directs a controlled spray pattern preferably 45 ° from the perpendicular . a valved extension conduit in communication with the annular conduit is releasably coupled to a water source such as a garden hose connected to a water faucet for supplying the spraying device with pressurized water .