A-B1690457-AI SPRING-THR RETURNOne New Aftermarket Replacement Throttle Return Spring Fits Briggs & Fits Stratton Small Engines This throttle return spring (Spring Thr Return) is a carburetor linkage component that resets the throttle to its idle position after the operator releases the throttle control. It maintains consistent throttle response and proper engine speed control on Fits Briggs & Fits Stratton (B&S) small engines used in lawn mowers and outdoor power equipment. The