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Air filter (Air: -->, Air+fuel: ==>) _____________ / \ Choke plate Throttle plate | ||||||||| | (Fully open) Venturi (Partially open) | ||||||||| |______________ v _______________________________ | ||||||||| \______/ | ||||||||| -> -> -> -> -> ==> ==> / ==> Intake | ||||||||| -> ----O---- ---> ===> ==> ==> O ==> pipe to | -> -> -> -> -> __||__ ==> ==> / | ==> cylinder \____________________ ___/ || \_____________|__________________ || || | Fuel __________ Air bleed ->|| ||<- Main nozzle o---------+ Inlet ______ |____________||______||__ |--> Pull | |_ _| || \ Speed <--/\/\/--+ from Needle ->| __A_______________ || | control Spring governor Valve | |o__/ \ || | closes |-----| Float |-----||---| throttle | . . | | Gas || . |<- Float bowl plate | . . .\_____________/. . . || . | \______________________________/