from what i've read the pilot tube has an orifice at the end? on mine i cannot see any hole in this so gas could get thru , i've tried cleaning but not knowing what kind and how big the whole is i;m not sure how to do it, by the way i put a new thermo coupler on but that didnt solve the problem.

hello i'm a newb so bear with me, i have a coleman presidential that the pilot will not light at all, i got the whole burner assy out of it and took the thermocoupler and cleaned it and noticed that the pilot supply tube looked like it had a valve of some sort in the tube down by the pilot itself? i...