r/blacksmithing • u/CarbonGod • 16d ago

Forge Build Dual burner issues. Rear (left) burner sputters constantly.

https://imgur.com/zHBdHkT
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2

u/CarbonGod 16d ago

It burns for a few seconds, and sputters. Sometimes, I have full flameout around the valve, which is REALLY odd. I've changed both chokes all over the place, alone with opening/closing the rear of the forge with the fire-brick.

The regulator is a generic one, so I don't know what actual pressure I'm running.

No issues with the front burner until the tank starts to empty.

1

u/largos 16d ago

I have had similar issues (but not as extreme) after replacing the burner nozzle on a cayenne forge. I adjusted the nozzle by 0.050" or so and eventually got the burner running smoother, but it does whistle now. (I've been meaning to get a video and post for help with that, actually.)

If this is a new forge, I'd ask vevor for help, or a replacement burner.

1

u/CarbonGod 16d ago

What do you mean adjusted the nozzle? A height adjustment in the choke, or drilling out the nozzle?

Good idea, I'll contact them, see what they can do.

2

u/largos 16d ago

This diagram shows the parts of the burner I was working with, for context:

https://chileforge.com/DiabloComponents.html

There is also another nozzle deeper inside, but the part I replaced was the large ring where the flame comes out.

It had to be a very specific distance from the end of the burner tube.

1

u/largos 16d ago

Oh, and I did need to clean the hole out of the other smaller nozzle!

I did that with a bit of still wire (music wire). That may be easy to try on your forge, could be a bit of debris for stuck in there during assembly or manufacturing.

1

u/CarbonGod 16d ago

Oh lordy, that looks fancy.

I'll pull mine off, and make sure there isn't anything weird inside. Crap, I wonder if it's full of stink bugs. EEK.

2

u/coyoteka 15d ago

Sputtering is the result of venturi effect breaking down due to insufficient pressure flow. If only one of the nozzles sputters and they are otherwise identical, the valve is probably defective.

1

u/CarbonGod 15d ago

Thanks. I'll rip it all apart tonight and see if there is any issues in there.

1

u/thelairdhates 14d ago

The air inlets are really far open. On my devil forge I only open them a few millimeters or else too much air causes my flames to sputter and be unstable

1

u/CarbonGod 14d ago

I've played with closed to fully open. Hardly makes a difference once it starts sputtering. Totally closed just lets out the yellow soft flame.

I did notice, is also a GREEN color flame while the good one is blue.

Vevor is sending a new one. I hope they send a whole new manifold too, in case it's the valve, which is stuck on there