RE: I need help NOW...Im fed up with this
erm, does it have a priming button on the tank itself. Otherwise remove your hand from the exhaust and remove the air filter. the open the throttle and put 2-3 drops of fule into the carb, this will go into the engine than when u rotostart it should just go, with no hand on the pipe. Once it is runnign give it some revs/ run it abit then after that should start every time, until you put it away.
if that doesnt work
a) put more fuel into the carb or
b) remove the glow plug and put some in there.
this shoudl make ti work. it does for mine. otherwise replace all lines etc