VEVOR Drag Harrow, 4 ft Heavy Duty Tow Behind Drag Harrow with Adjustable Bars & 72 in Chain, Driveway Grader Landscape Rake for ATV, UTV, Tractor, Mower Tow Behind Yard Lawn Leveling Tool
Yes, a 19.5 HP riding mower should be able to pull this 4 ft drag harrow for light to moderate leveling work, assuming it has a suitable hitch and adequate traction.