I am using BG-10 burners 1/2inch plumbing to valve to burner via hot water heater gas line. I can not get a blue flame to save my life. Yes I adjusted the o2 plate and my flame doesnt change at all when I turn it. I turned on slowly to see if my regultor was the issue, nada. then I got my work truck back into the drive way and plumbed up the propane direct with a safety valve no pressure disk regulator, still the same. I have even used the 1/4 lp gas line direct to the burner and nothing(bypassed the 1/2 inch iron manifold)I am open to suggestions Ive changed the CGA fitting on my propane thinking it would do something, nada. oh yeah, ive tried all three burners too.Help me please, since I cant play with my build ive resorted to drinking. thanks for your help. These are brand new bought from morebeer so no bugs stuck in the venturi.