Part 640350, Carburetor, is a genuine OEM part manufactured by Tecumseh. Tecumseh carburetor kit. If the carburetor is clogged, the engine won't get enough fuel. As a result, the engine may not start or may run rough. It is used in Lawn Boy Lawn Mowers. This cleaner works to dissolve deposits inside the carburetor. Find appliance parts, lawn & garden equipment parts, HVAC parts and more from the top brands in the industry.