My mtd lawn mower runs on even act like it don't power up

Sometimes this problem is governor related..but most times there is a problem with the carburetor. The idle circuit in the carb may be partially clogged or the linkage on the carb is worn and weak. A carburetor/spray choke cleaner could help if you spray it directly into the engine while it is running and even right before starting it up. Best way to clean the ENTIRE carb though is to remove it from the mower...take the lower float bowl off and soak it in some type of solvent/cleaner with the rubber tipped gas inlet needle removed and the float also if it is plastic. For a thorough cleaning, these parts need to be removed anyway....No rubber or plastic carb parts should be soaked with the carbs main body Pahy close attention to the brass bolt that holds the bowl on as it is the main jet and has very small holes in its middle and bottom that must be clear.