WM 80 Repair Carburetor Basics
wc_tx000522gb.fm 51
Partial Throttle Operation
At partial throttle, the choke (a) remains in the open position and the
throttle (b) is partially opened. During partial throttle, low pressure
exists on the engine side of the throttle plate. The low pressure draws
fuel from the three progression fuel nozzles (d). As low pressure
begins to fill the carburetor throat, the check valve starts to open and
fuel begins to flow from the main nozzle (e).
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