Powered by an advanced low-emission engine, the lightweight curved shaft FS 40 C-E STIHL trimmer features Easy2Start™ and a new starting system designed to help prevent flooding — so you can get started with fewer steps. High fuel efficiency, along with excellent balance, makes this trimmer comfortable on the wallet and in the yard. 20% More Fuel-efficient than Previous Model *A majority of STIHL gasoline-powered units sold in the United States are built in the United States from domestic and foreign parts and components.