Remove the bolt that holds the bottom float bowl on the carburetor and clean it thoroughly. Careful, as it has an exterior washer between the head of the bolt and the bowl. Careful with the carb body gasket above the bowl also. The brass bolt is the main jet of the carb and if you are not using an inline fuel filter, debris, dirt, sediment and gum and varnish collect on it. There are very small holes in the bottom and along the smooth sides of the bolt. Use no metal on it at all. If you need to scrape on it, use wood or plastic.
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