arranged on a fuel introduction path connected along a fuel feeding path and a fixed quantity fuel chamber for temporarily storing fuel delivered from the primary pump an internal wall of the fixed quantity fuel chamber undergoes elastic displacement allowing its internal capacity to expand shrink within a predetermined range the fixed quantity fuel chamber is connected to a fuel delivery path that communicates with the intake passage side and has a manually operated open close valve the valve is opened in a state in which due to the primary pump being operated the fixed quantity fuel chamber is filled with a predetermined quantity of fuel while enlarging its internal capacity whereby it shrinks due to an elastic contraction force and the fuel application_number US 201113189295 A description embodiments of the present invention are described below with reference to the accompanying drawings fig1 shows a partial vertical cross section view of a carburetor 1 a integrally equipped with a starting device according to the present embodiment the configuration of the carburetor portion which is penetrated by an intake passage 2 and which feeds vaporized fuel using a fuel nozzle is the same as conventional examples therefore a detailed description of the carburetor portion will not be provided and a detailed description will.