Husqvarna 50 Workshop Manual page 41

Begin assembly with the fuel metering side. Install the
fuel mixture adjustment screws. Depending on the
carburetor type, either install the fuel circuit plate and
gasket or the welch plugs. Use a suitable drift to install
welch plugs. Install the needle valve, spring, lever and
shaft.
Check and adjust the tip of the fuel inlet lever. Correct
lever adjustment is critical. An incorrect lever setting will
cause erratic engine operation. On Walbro WA
carburetors, the tip should be flush with the fuel chamber
floor. On Walbro WT carburetors, the lever tip should be
flush with the raised casting next to the lever on the fuel
chamber floor.
Install the metering diaphragm gasket against the
carburetor body first, followed by the metering diaphragm
and cover. The cover should be positioned so that the
diaphragm ventilation hole is towards the cylinder.
Downloaded from www.Manualslib.com manuals search engine