In this multipurpose engine, a fuel gas evaporated within a fuel tank of the engine is drawn out of the fuel tank and is adsorbed by an adsorbing material, the fuel gas is separated from the adsorbing material, and then the fuel gas separated from the adsorbing material is suctioned into an intake system of the engine by using negative pressure inside the intake system. The adsorbing material is accommodated in a canister, and two connection ports used for connection with the canister are respectively provided at a heat-insulating intake pipe between a carburetor and the engine and at a clear section of an air cleaner.