;;;MAKE SURE YOU ARE IN A WELL VENTILATED AREA WITH NO OPEN FLAMES OR SPARKS;;; Your carburetor needs cleaning. There is dirt or something that needs to be removed from the inside. If you can't do the work yourself, you should take it to a repair shop and have it cleaned or maybe rebuilt. It you do it yourself there are Utube videos that are very helpful for the person with limited know how. Don't just take it apart, because you have to set the jets and fine tune it after its put back together. Make sure after its repaired that you change the fuel filter and check the gas tank for dirt/crud on the inside. Good Luck and I hope this helps