A-B1691504-AI SPRING-GOVERNED IDLEOne New Aftermarket Replacement Governed Idle Spring Fits Briggs and Stratton Small Engines This governed idle spring is a key component of the throttle governor system on Fits Briggs and Stratton (B&S) small engines. It works alongside the governor lever and throttle linkage to regulate engine speed at idle, maintaining consistent RPM and preventing the engine from hunting or surging under light load conditions. A worn or broken governed idle spring