Diaphragm carburetor and method of assembly

A diaphragm carburetor for an internal combustion engine, comprising:

• an air-fuel mixing body having an air-fuel mixing passage and at least one bore;
• a throttle valve received in the air-fuel mixing passage;
• a fuel nozzle;
• a fuel metering chamber assembly having a diaphragm an upper body and a lower body separable from one another the fuel nozzle extending from the upper body for receipt within the air-fuel mixing passage, at least one of the upper and lower bodies having a threaded bore for threaded receipt of at least one first fastener to attach the bodies together with the diaphragm carried between the bodies to define a fuel metering chamber on one side of the diaphragm and an atmospheric chamber on the other side of the diaphragm, the upper and lower bodies having axially aligned through openings upon being attached to one another;
• and
• at least one second fastener having a threaded shank that extends through the axially aligned through openings beyond the upper body for threaded receipt in the threaded bore in the air-fuel mixing body to attach the fuel metering chamber assembly to the air-fuel mixing body.