Layered diaphragm

A method of making a carburetor including a diaphragm, comprising the steps of:

• forming an opening through a sheet of a first material;
• bonding a sheet of a different second material with the sheet of first material so that the second material overlies the formed opening;
• and
• clamping the bonded sheets between first and second carburetor bodies outside of the formed opening so that the second material moves in response to a fluid pressure differential on opposite sides of the bonded materials.

A carburetor, comprising:

• first and second bodies;
• a fuel chamber located between the first and second bodies;
• a multilayer subassembly clamped between the first and second bodies, the multilayer subassembly comprising a first layer of material and a second layer of a different material bonded with the first layer of material;
• and
• a fuel flow valve that opens and closes to allow fuel flow into or out of the fuel chamber;
• wherein the first layer of material flexes to selectively actuate the fuel flow valve, and the second layer of material defines a portion of the fuel chamber and moves in response to a pressure differential across the second layer of material.