11.3.3 Inspection
Check if needle valve assembly, needle valve seat and float assembly are worn or broken.
If needle valve core is worn or broken, replace it with a new one.
If needle valve seat is worn, the main carburetor body shall be
replaced.
If the tongue plate of float is worn, replace it.
Check if oil needle of carburetor is worn or broken. If it is,
replace it and main nozzle together.
Check if idle jet, main jet or main nozzle is worn, broken or
contaminated. If it is, replace it.
Check if plunger is worn. Replace it if necessary.
Check carburetor itself and fuel pipe. If they are dirty, clean it
according to the user’s manual.
11.4 Installation
Assembly
Install idle jet, main jet, main nozzle and main foam pipe.
Install float, float pin and needle valve core.
Install upper and lower housing sealing rings, lower housing assembly and lower housing connecting screw.
Install mixture screw washer, mixture screw sealing ring, mixture screw spring and mixture screw. Put the mixture
screw on to the housing body.
Install plunger adjusting screw spring and plunger adjusting screw.
Install plunger spring and plunger assembly.
Install top cover sealing ring and top cover.
Installation
Install the carburetor in the reverse order of removal.
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