Starting device and carburetor supplying fixed amount of fuel

A carburetor and starting device, comprising

• an intake passage,
• a metering chamber,
• a manually operated primary pump for suctioning and pumping fuel, the primary pump being arranged on a fuel introduction path in communication on an introduction side with the metering chamber;
• and
• a fixed-quantity fuel chamber for temporarily storing fuel that has been drawn from the metering chamber and delivered from the primary pump;
• wherein
• the starting device feeds a fixed quantity of starting fuel from the fixed-quantity fuel chamber to the intake passage during engine start-up;
• wherein at least a part of an internal wall of the fixed-quantity fuel chamber undergoes elastic displacement, allowing the internal capacity of the fixed-quantity fuel chamber to expand and contract within a predetermined range;
• the fixed-quantity fuel chamber is connected to a fuel delivery path that communicates with the intake passage, the fuel delivery path having a manually operated open/close valve provided partway therealong and biased to a closed position;
• the open/close valve of the fuel delivery path is manually 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 starting fuel while the internal capacity of the fixed-quantity fuel chamber is enlarged,
• whereby the fixed-quantity fuel chamber contracts due to an elastic contraction force and discharges a given quantity of starting fuel to the intake passage via the fuel delivery path.