Echo 12300003662 Leaf Blower Carburetor WT-409B

The Echo 12300003662 Leaf Blower Carburetor WT-409B meters fuel and air by pulling both elements through internal jets, where controlled passage openings regulate mixture strength during engine operation. As airflow passes through the venturi section, pressure differences draw fuel into the stream, forming a calibrated blend that moves toward the combustion chamber under varying throttle conditions. Located between the air filter housing and engine intake port, the unit connects with fuel lines, throttle linkage, and intake components within the body. The assembly regulates mixture delivery control, intake flow balance, and engine combustion support during ignition start-up, running activity, and repeated operational use.