Chaz is correct and I'll add that your symptoms are consistent with an air (vacuum) leak in the intake circuit. Somewhere downstream of the carburetor. The two most common areas are the carb where it attaches to the intake manifold and the gasket sealing surface of the manifold where it attaches to the cylinder. Leaks at either area will allow excess air to enter and provide a lean air to fuel mix resulting in a fast idle speed and poor performance.
This, as Chaz mentioned, is assuming you have a Chinese 2 stroke engine. It is important that you tell us what engine you have when asking for help or advice.
Just curious but is your location, 'Williston', in Florida?
Tom