dont pull real hard. put choke lever up,prime twice,pull straight up and let it go back down.if not started pull again(first time may take 2-3 pulls)and may have to prime again.
once started you may have to give some throttle and adjust idle set screw.after warmed up,push choke halfway down.after a few more minuites push choke all the way down.and take for a short slow ride at first,to make sure everything is working.
i do pull my pull start hard,but im 120lbs,if you have larger arms and are bigger,dont pull as hard.