ACE Equipment Sales & Service stock Rayco chippers, stump grinders and forestry mowers Our Rayco stump grinders are powered by Honda, Kohler, Vanguard, Kubota or John Deere engines in 13 HP to 140 HP and come in a range of types including, Mini Work Force, Self Propelled Wheeled, Self Propelled Track and Tow Behind. Our Rayco forestry mowers are purpose built from the ground up to be the most productive and reliable mulching application available on the market today.