gas not coming out line from tank

[dwint51]

im having some starting issues with my jonway two stroke.i filled the tank and disconnected the gas line and nothing came out.so I blew into the gas line and it isn't clogged.arent these gravity fed.ive had problems with this since I bought it.its hard to start for one and it idles high till warm so im assuming the electric choke is working.this only has 70 miles on it.tried a new plug bpr7hs that came with it.