when had the carb worked properly for the last time?
Maybe some cleaning will do the job.
There is a little bore in the bowl which tends to be blocked.
I personally think that some ultrasonic cleaning is the best way to handle this.
Beside this, there are several other reasons for not running.
I just had someone here who had a bad ground problem. Found while trying to start in the beginning darkness. Without this little spark we would be still searching
good luck, Joachim