A diaphragm pump (1) operates by receiving a pulsating pressure in a crank chamber (2a) of an engine (2). The diaphragm pump includes a low pressure side diaphragm (10) that operates by receiving a pulsating pressure, a high pressure side diaphragm (20) th...

An engine (1) includes a crank chamber (7) in which pressure fluctuation occurs and a carburetor (25) including a diaphragm fuel pump (100). The diaphragm fuel pump (109) includes a pump chamber (1108) configured to suck in and eject fuel and a diaphragm c...