usual deal...
replace stock chinese kit plug with NGK b(r)5(or 6)hs or steal the plug out of your hedgetrimmer etc.
remove carb. pour some fuel down the intake, just a bit.
try to start it, if it starts, revs up, then dies... all is well. clean the carb, something you should do when its new. theres always crud in the things when new. ie, remove the bowl, check the jet is clear... no bits of stuff in the bowl.
but otherwise, when you reinstall the carb, making sure its pushed onto the manifold completely, it should start and run. properly.
sometimes the fuel line doesnt want to flow if its half empty (full?). pop it off the carb nipple, turn the tap on, make sure it flows ok.
tickle the little brass primer thing on the side (assuming its the stock carb) until some fuel comes out. or undo the small screw on the bottom of carb bowl.
if it still doesnt start, there is something more troublesome afoot!
