A02 can not start

Please make sure you are using mixture of oil and gas since this is a 2 stroke. Gas:oil=25:1 / 20:1
please make sure gas valve is open
please make sure there is no air in the fuel line.
Please check your gas flow from fuel filter, gas valve to carburetor
Here below are two links that you can refer to as instruction
https://www.youtube.com/watch?v=nh5fIFU7ej0
https://www.youtube.com/watch?v=dRJAY01Veqw
Kindly double check your spark as well
https://www.youtube.com/watch?v=F1AuZLA0Lpk