How to take out the rubber plug on the upper part of carburetor oil needle

Hello, this kind of oil needle can unscrew the thing that presses the oil needle in the throttle valve, and then the rubber plug on it needs tweezers with better quality. You can also try to twist it.

Extended data:

Carburetor is a mechanical device that mixes a certain proportion of gasoline with air under the vacuum generated by engine operation. As a precise mechanical device, carburetor uses the kinetic energy of inhaled airflow to atomize gasoline. Its important role in the engine can be called the "heart" of the engine. Its complete device should include starting device, idling device, medium load device, full load device and accelerating device. The carburetor will automatically match the corresponding concentration and output the corresponding amount of mixed gas according to the requirements of different working conditions of the engine. In order to mix the mixture evenly, the carburetor also has the function of atomizing fuel for the normal operation of the machine.