Carburetor Basics WM 80 Repair
52 wc_tx000522gb.fm
Wide-Open Throttle Operation
At wide-open throttle, the choke (a) remains in the open position and
the throttle (b) is wide open. During this state, the throttle plate has little
affect on high- and low-pressure areas within the carburetor throat.
The venturi of the carburetor throat now takes over to create the low-
pressure area. The low pressure created by the venturi draws fuel into
the air stream. It also acts on the metering diaphragm which opens the
needle valve to its furthest-open position, allowing supply fuel into the
lower chamber. Fuel now flows from the main nozzle (e) located within
the venturi. Very little fuel flows from the idle nozzles.
To Next Page
Loading...
Need help?
General
