The MP 315 is a total redesign of the MP 305 mechanical drive riding trowel. It is an entry-level riding trowel with features found in larger riders. The higher horsepower gasoline engine and heavy-duty drive train is packed in an easy-to-service frame. Features include standard–duty gearboxes and four-bladed rotors. In addition, it is equipped with a torque converter clutch that gives the operator full variable-speed control of the rotors. Allen Engineering Corp. 800-643-0095.