The Briggs & Stratton 690251 is a genuine OEM governor spring. This small but vital component is responsible for maintaining a consistent engine speed (RPM) by pulling against the governor’s mechanical force, ensuring your engine doesn’t “hunt” or surge under different loads. Genuine OEM Replacement The Briggs & Stratton 690251 Governor Spring is the factory-original part designed to provide the exact tension required for your engine’s specific throttle response. Because governor springs are calibrated by their length and wire thickness, using an OEM part is critical—a spring that is slightly too stiff or too weak will cause the engine to…