If you have a carburetor on your pressure washer that needs to be cleaned, there are a few things you need to do first. Start by unplugging the pressure washer. Then, remove the spark plug and the air filter. Next, remove the carburetor by unscrewing it from the engine. Finally, clean all of the parts of the carburetor using a solvent and a rag. Be sure to dry all of the parts before reassembling them. ..