A one cylinder gasoline engine with 40 cubic cm displacement powers the Husqvarna 41. It has a cylinder bore of 40 mm and a piston stroke of 32 mm. The engine can produce 2.5 horsepower with a maximum speed of 13,000 revolutions per minute, or 9,000 rpm when it is being used to cut. The engine also has a Walbro WT-202 or WT-239, or ZAMA C1Q-W5 or W6 carburetor which, in conjunction with the cellulose fiber air filter, provides the fuel and air mixture for ignition.