Husqvarna 50 Workshop Manual page 36

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Carburetor Operation
The carburetor is a multi-position, integral diaphragm
type which can be divided into three main sections, the
metering section, the mixing section and the pumping
section.
The metering section consists of the metering diaphragm.
the fuel nozzles and the fuel flow control functions.
The mixing section consists of the venturi, where the fuel
and air are mixed and where the throttle valve and (on
the model 51 and 55) the choke valve are located.
The pumping section consists of the fuel chamber and
the diaphragm type fuel pump with the inlet and outlet
check valves. The fuel pump draws the fuel from the
tank to the fuel chamber, then pushes the fuel on to the
metering section.
Disassembly
The internal passages of the carburetor body are
delicate and are easily damaged if proper service
Remove the screws retaining the metering diaphragm
cover and remove the cover. Carefully remove the
metering diaphragm and gasket.
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NOTE !
procedures are not used. Damage to the fuel
passages and seats is not repairable and will
necessitate the installation of a new carburetor.
Make sure the work area is clean and exercise
extreme care during disassembly, cleaning and
reassembly of the carburetor.