B530B Blue Bird Lawn Aerator Briggs 5HP Engine Homeowners and landscapers who want a powerful aerator in a compact design need not look farther than the 424. The machine is simple to use and features a working width of nearly 18″ to aerate over 20,000 square feet per hour. The 424 is easy to maneuver, while the built-in lift handles and removable front weights assist in the loading process. The clutch lever is integrated into the folding handle, and easy-to-use depth controls give precise and consistent coring depths up to 3″. Available with a 4 HP Honda engine or a 5.5 HP Briggs & Stratton engine.