Unless you just have to have a gasoline edger for whatever reasons, save your money and get this Edge Hog instead. It easily cuts the edge around your curbed lawn and with little noise or fuss.  The only drawback to an electric appliance is, of course, the electric cord.  Get over that small learning curve and you are home free with an edger that works, is not noisy or troublesome, and lets you keep the wallet a little fatter.  My wife and I are very happy that we bought this edger and we both recommend it.