The OEM Kohler ECV860 throttle body 25 583 13-S is a replacement part for lawn mower engines, specifically compatible with brands such as Kohler, Dixie Chopper, Exmark, Bad Boy, Gravely, John Deere, Walker, Wright, and Toro. It is designed for models like ECH740, ECH730, ECH940, ECV749, ECV740, ECV850, ECV860, ECH749, ECV940, ECV730, and PCH740. As an engine part, this throttle body is crucial for controlling the speed and performance of the lawn mower, ensuring optimal functionality and efficiency in yard and garden maintenance tasks.