The Husqvarna 597523905 Lawn Mower Throttle Control POST PZ/MZ 60 is a replacement throttle control designed to help maintain accurate engine speed adjustment on compatible lawn mowers. It allows the operator to regulate the engine throttle by transferring control input to the throttle mechanism, supporting smooth acceleration and consistent performance during mowing. Replacing a worn... https://www.wholetoolbox.com/husqvarna-597523905-lawn-mower-throttle-control-post-pz-mz-60