The present invention relates to a method to control a grass cutter engine. A spring type fuel hose of an engine jumps down vertically from the top of an upper engine of a rotary shaft and is connected to an exit of a fuel tank. While a grass cutter is used, a body of the engine is rotated to the left and right by being linked with a work table rotating a blade. The spring type fuel hose is wound or released a little repetitively only, but the engine and the fuel hose do not collide with each other. A throttle electric wire to control the engine jumps a center space of the spring type fuel hose on an upper part of the rotary shaft, and electricity of a battery installed on a stool of a fixed part or the engine is supplied to an electric carburator by a button connected to a flexible handle at the fixed part, and the engine of the grass cutter is controlled by opening or closing the throttle valve of a female screw pairing with a male screw of a speed reducer shaft. A method for controlling the grass cutter wirelessly controls the engine by supplying electricity of the receiver installed at the engine to the flexible handle of the fixed part by a button of a remote controller, and the work table does not have a throttle wire, without the flexible handle of the fixed part and the throttle wire and components thereof. A method to control the grass cutter manually controls the engine by opening and closing the throttle valve by a throttle lever, which the throttle wire at the engine jumps the internal center of the spring type fuel hose fixed to the top of the engine on the upper part of the rotary shaft and is connected from the flexible handle to. The methods for controlling the engine of the grass eliminator relates to the method for controlling the engine of the grass eliminator without the throttle wire, the throttle lever and a stop button and the electric wire thereof on the work table where the grass cutting is done by rotating the blade. The present invention i
