It has to have a choke find its position-setting with respect to cable
setting and try starting without or minimum choke. Plug or more could be
bad you need a blue not yellow spark. Is air filter clogged. It is
possible running 2 stroke you carboned up the valves and they do not
seat anymore lowering compression to much to have power. But the right
mix of gas and air and it should fire. Try Either in the carb with choke
off.