This DIY repair guide shows how to replace a carburetor in a leaf blower. The carburetor mixes fuel and air in the right proportions so that the spark plug can ignite the mixture inside the cylinder, powering the engine. If the leaf blower engine won't start even though there's fuel in the tank, the carburetor could be the problem. You could rebuild the carburetor, but many people find it easier to replace it, using a manufacturer-approved gas leaf blower part.
Use this process to replace the carburetor on common Craftsman, Husqvarna, MTD, Weed Eater, Troybilt and Poulan leaf blowers.
If you prefer to rebuild the carburetor, follow the step-by-step instructions in How to Rebuild a Leaf Blower Carburetor.