Billy Goat PL2501SPH PLUGR Aerator 25" Reciprocating, Rear Wheel-Hydro Drive, Honda 163cc EngineBilly Goat PL2501SPH PLUGR Aerator 25" Reciprocating, Rear Wheel Hydro Drive, Honda 163cc Engine The all new Next Gen 25 PLUGR delivers up to 42,550 sq. ft. of aeration per hour in a single pass with core depths to 2. 75. For the best combination of productivity, operator comfort, superior aeration results, variable hole density and remarkably low maintenance in its class, the PL2501 Ser. PLUGR offers an estimated 30+ percent greater return vs.