I have a new big bore engine, ran for an hour really well, I put it away for a month tried to restart it wouldn't. Finally after 20min of starting it finally ran (perfectly). Next day won't run at all,so put a brand new carb still won't run. Tried a new coil, spark is strong magnets seem to be at the coil when piston is at top dead centre. This engine does not even sound like it wants to fire at all and it doesn't change even using starter fluid any thoughts?