JT3

It's definitely off. I don't have a drill press and this was my first tap. Didn't work out so well. Looks like I need to start over on the head piece. Thanks. 

5 minutes ago, Buzzkill said:

He's talking about burrs in your mig tip or the fittings attached to it and/or your gas line, not the burner tube.  You're looking for anything that could restrict the flow of propane up to the point where it exits the mig tip.

Ooohhh. Thanks. As for your rich comment earlier. Would you recommend downsizing the mig tip to. 030 from. 035?

5 minutes ago, Mikey98118 said:

A burr or contaminant inside the gas passage is capable of causing your problem. It easy enough to break down the passageways to clean them out and check for loose burrs. 

Thanks. Do I need to grind out the threads in the large end of the reducer as well or don't they count as burrs? 

Thanks. I have a 1 1/4 to 3/4 reducer on the end of the 3/4 x 10" nipple. The end of the bell iis about 1/8" from flush into the forge. I'll have to look and see if they have a 1.5 x 3/4 reducer. 

I should have also added that outside of the forge, the burner burns very steadily from barely any pressure, all the way up to wide open 30psi with not much difference other than flame length. The flame is much longer than the depth of my forge though. 

A couple more pics

Complete newbie here so bear with me. I made a small fire brick forge and a burner to try my hand at this. I like it, and it works. 

My flame from the burner sometimes "falls" to the bottom of the Forge for 30 seconds, then pops back up to looking like a rocket engine. Maybe 30 seconds up, 30 down. Sometimes a couple minutes each way. It still gets hot, but when it's on the floor, it definitely isn't heating as well. Firebrick glows orange so there's heat there, it's just annoying hearing it change pitch. 

I know I have at least one problem because my drill and tap job for the orifice isn't even close to plumb. If someone could give a suggestion as to where to start looking at this I'd appreciate it. 

Harbor freight mig tip .035. I don't know what pressure I am running, but It seems to run best on quite low pressure on my 0-30psi regulator. 

Here's a video of the flame. 

Regardless, it's way better than my first try with a weed burner. 

Thank you.