New quality OEM Zama C1U-K52 (C1U-K47)Carburetor. Replaces Echo part numbers: 12520013311, 12520013312, 12520013314, 12520013315, 12520013316, 12520013317, 12520049030 and 12520046831. Fits many different models. If you are not sure if this is the correct item for your unit please send us model and serial numbers and we will gladly check for you.