Hello Guys
I have brought a used Stihl chainsaw for conversion and it is around 56 cc engine and first of all i give it a test run and it works fine and the carb is sucking the fuel after that i have decided to start conversion and i started off by rebuilding the carb and it does have a Tillotson Carb on it so i opened every part of the carb and cleaned it with gas then i have reassembled it and put it again on the engine but then the engine does not start and i have noticed that the carb is not sucking the fuel and when i dip it in a transparent fuel bottle it was just giving pulses

so can any body of you tell me that what is wrong with the carb

waiting for your suggestions
Abdul Samad