2017 Jacobsen GA24 Walk-Behind Aerators. 6 Identical Units In Stock. 10 H.P. Briggs Gas Unit. Units with regular Tine Heads and Also Quad Tine Head Units Available. All Units Equipped with Windrow Attachment. Fully Inspected, Fully Serviced, Tested, Set Up With New Tines, and Ready to Work. Very Good Condition.