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This replacement compression spring is a genuine OEM part for a snow thrower. Though small, this compression spring plays a major role in the throttle control lever. The throttle connects to the governor arm through two linkages. When then operator moves the throttle lever, it causes the linkages to move and reposition the governor arm. This is because of a spring that engages the mechanism. Over time, springs will wear out due to repeated use. This spring, in particular, is fairly exposed and could easily sustain physical damage that can break it. Either way, if the compression spring is not working, the throttle will not reposition the governor no matter how much the operator moves the lever. Using a wrench set, remove the bolts that mount the throttle to the snow thrower and unthread the spring from the lever. A pair of needle-nose pliers will make this easier. Rethread the replacement spring onto the lever and bolt the throttle back into place. This replacement compression spring is a high-quality part sourced from its original manufacturer and is compatible with engines made by Tecumseh, Lawn Boy, Toro, Husqvarna, and MTD. This part does not include any additional hardware and ships individually.