If the trimmer does not start, try to push the primer button and pull on the starting rope a few times more. If this doesn’t help, I recommend to:
read the instruction manual carefully;
study in detail the method of the first start-up and running-in of petrol cutters;
try to understand how the trimmer works, how gasoline is pumped up, etc.
The most common reasons for the malfunction of petrol cutters are as follows:
the quality of gasoline is poor;
the incorrect proportion of gasoline and oil;
clogging of the fine filter;
the spark is gone.