A governor spring for a Troy-built push lawn mower is a crucial component of the engine’s governor system. It regulates engine speed by controlling the throttle valve, ensuring smooth and efficient operation. Common symptoms of a faulty governor spring include engine surging, stalling, or difficulty starting. Troubleshooting involves cleaning and lubricating the governor assembly and inspecting the spring for damage. Replacement options include OEM and aftermarket springs with varying durability and performance characteristics. Additional resources such as manufacturer websites and forums provide valuable information and support for resolving governor spring issues and maintaining optimal mower performance.