There is no problem in getting the fuel upto the carb, the check valve is the original that came in the engine box and the plug is good, it's a model techincs super cat 4 stroke with a good strong glow driver.
Could there be any internal problems with the engine that would not allow the fuel to reach the combustion chamber.
The engine is brand new in the box and has only had 3 tanks of fuel through it, and it was a real pig to start for the first time too.
The last time we tried to start it it took 20 mins, when it did eventually start it was with one hell of a back fire.
Can we check anything internally????