This genuine OEM replacement part is a governor spring for a wide range of appliances, including tillers, generators, snowblowers, and blower vacuums. As its name suggests, this spring is located in the governor. It maintains tension in the governor arm so that when the operator repositions the throttle lever, it engages the governor. The governor then modulates how much fuel the throttle allows into the carburetor, effectively slowing down or speeding up the engine. After repeated use, springs begin to lose some of their tension and wear out. If the governor spring no longer provides as much tension, the governor arm will not move and the throttle will not engage. Without a functioning throttle, the operator will not be able to regulate how quickly the engine runs. Replacing this spring is easiest once the throttle has been disassembled using a nut driver set and a pair of pliers. This replacement governor spring is a high-quality part that matches the exact requirements for Toro and Briggs & Stratton appliances. This part is sourced from its original manufacturer and does not include any additional hardware.