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Flame under Masterbuilt XL (not in the burner area)

post #1 of 11
Thread Starter 

I went to use my Masterbuilt XL for the first time this year and tried it out last night before todays smoke. I started it up and the flame seemed very small so I let it go for a while and all of a sudden there was a fire under the smoker. It looks like it is coming from where the burner pipe meets the gas pipe. The pipe has holes ( I assume for safety) and it seems like gas is leaking from there and catching fire. I have to turn the gas all the way up to seem to get any flame on the burner when I do this the fire catches after 10 minutes or so. 

 

I have tried to push the pipe in farther but doesn't seem to move at all. It worked before I put it away for the winter. Just wondering if anyone has any ideas. Might have to do the Boston Butt in the oven today....this is a sad sad day

post #2 of 11

Since you said you put it up for the winter, that makes me think the burner tube could be clogged. Spiders just love to spin webs in those tubes. I would pull the burner out and inspect and clean everything. Pipe cleaners work great for this.

post #3 of 11
I would say something has made a home in the tube.evict them!biggrin.gif
post #4 of 11

I have a very similar problem with my MasterBuilt 30" gas smoker. It worked fine for the first 10-12 times then I noticed that I was getting flames where the control valve pipe enters the venturi. The flame is not there all of the time. When I first light the burner it seems fine. But after a few minutes the gas around the venturi ignites. The flame sometimes will go out (but the burner its self is still ignited) and then it will come back. It really seems like there is too much gas going into the burner but I have the problem even on the lowest settings.

 

I've inspected the burner, per the suggestions here. It it very clean. Any other suggestions would be appreciated.

 

Thanks.

 

Love the site, by the way.
 

post #5 of 11
Quote:
Originally Posted by Green69Charger View Post

 

I've inspected the burner, per the suggestions here. It it very clean. Any other suggestions would be appreciated.

 

Thanks.

 

Love the site, by the way.
 

Take the burner out and flush it with water, from both ends.... A visual inspection is not adequate.... Then blow it out with air.... even air from the blow end of a shop vac.....   Dave

post #6 of 11

Thanks, Dave. I'll give it a try. So the reason for the flame at the venturi tube is excess gas that cannot make it thru the burner, correct? Does the burner get gunked up with smokey tar if I use my cold smoke generator? I guess that it could given how badly everything in there gets coated with that tarry gunk.
 

post #7 of 11
Quote:
Originally Posted by Green69Charger View Post

Thanks, Dave. I'll give it a try. So the reason for the flame at the venturi tube is excess gas that cannot make it thru the burner, correct?  The gas tube to the burner flame area usually gets plugged... and it doesn't have to be much to slow the gas flow....

 

Does the burner get gunked up with smokey tar if I use my cold smoke generator?  Don't know ??  It possibly could... 

 

I guess that it could given how badly everything in there gets coated with that tarry gunk.
 

post #8 of 11

Exactly what mine did when I get spider in the venturi tube. I didn't have a spider brush (yes you can buy those, that's how common this problem is), but I did have some 12 gauge stranded copper wire. I stripped the end and untwisted it so I could splay the wire ends out like a bottle brush. Stuck it in the venturi while twisting it between my fingers. VOILA! Spider webs get gathered up and come out with the wire.

post #9 of 11

Thanks for the info. I'll remember that, probably this spring when I get back into outdoor cooking. It's getting close to winter here in Northern Utah.
 

post #10 of 11
Quote:
Originally Posted by Green69Charger View Post

Thanks for the info. I'll remember that, probably this spring when I get back into outdoor cooking. It's getting close to winter here in Northern Utah.
 

GC, evening..... Since you have recently joined the forum, I will let that statement slide by, like a sled driven by a 12 year old on ice...... 

 

This forum, reading it daily, should tickle the taste buds into dragging out the smoker in the foulest weather known to folks in Utah..... 

 

I will predict you are smoking in less than a month...  If I am wrong, remind me....  I love being wrong..... Another valuable learning experience is always welcome....   I figure every day I learn something keep me looking at the green part of the grass....

 

Dave

post #11 of 11

Funny, first google hit sends me here and nails my problem. Second use of my new Masterbuilt and there's flames coming out around the gas control knob. A few turns of the screw later, and those little white crispy spider nest things see the light of day.  Two cue tips duct taped together did the trick... and now I'm smoking again!

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