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Tractor Talk Discussion Forum

Fire in exhaust

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Smart Deere

05-18-2005 18:41:01




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Just bought a JOhn Deere A. Ran it up the road in high gear full throttle and had a small glowing flame ( I think ) It come out of the exhaust. Is it normal? Will it hurt it?




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Afterburner

05-20-2005 05:46:56




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
It's actually JD's super-secret afterburner project, you must have a test model:^)



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buickanddeere

05-19-2005 10:38:34




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
Unless the exhaust mixture is carrying enough raw fuel to get above the LEL when mixed with atmospheric oxygen then burning isn’t happening above the stack. That red or yellow that looks like flames, isn't flames. The burning was done in the combustion chambers before the exhaust valve ever opened.. Materials be it gas, liquid or metal will glow incandescent when temps start getting about 1200F. Pure clean air at even 1750 will barley visibly glow. There has to be some particles of carbon etc from unburned fuel or oil suspended/ carried in the exhaust gases. The little particles are what you see glowing red or yellow. Set the oxygen acetelyn torch rich and there is lots of bright flame from the red hot floating soot. Now give that same amount of fuel slightly more oxygen than what it needs to burn clean. And even though the flame is much hotter. The “flame” is "smaller" and very dim. That's also why a gas or kerosene lantern without a mantle makes very little light. The almost invisible flame heats the mantle white hot and make it glow. By the way Coleman lantern mantles are too radioactive to be allowed to leave a nuclear station.

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jimont

05-19-2005 08:59:26




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
Not to worry , I've managed to get a foot of flame out of a Ford 5000 diesel when puttin' the boots to her. She's got nearly 10,000 hrs on her with no problems.



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slim

05-19-2005 05:21:15




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
Got a 420 LP that we used to run with a straight pipe. It shot out a nice flame at night too.

slim



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Leroy

05-19-2005 05:05:44




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
Normal, when working at night you will see the muffler has a bright red glow and the flames shooting a foot in the air, the darker it is out the easier to see and the heavier the load the more you will see that is why you should never park in a building that has a dirty wood floor less than 3' above the exausat stack



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Fawteen

05-19-2005 02:48:08




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
Oh yeah. I remember plowing at night with Dad's Super W-6 and 3-16's in our heavy clay loam. Be about a foot of fire coming outta the stack, and the muffler would be so hot you could darn near see through it.



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37 chief

05-18-2005 22:41:53




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
I can still remember Dad using the F 12 in the evening cutting beans, and there would be a flame comming out of the exhaust. I don't think you will have a problem. Stan



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Tim B

05-18-2005 20:33:27




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
I would guess that you may be burning a bit too rich. I don't know much about Deere Bs but I have a 3 year old Honda snow blower that had a similar problem - it turned out to be a leaking carborator giving too much gas to the cylinder. I'm not saying your carb leaks, but may be just adjusted too rich.



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Mike (WA)

05-19-2005 08:14:17




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 Re: Fire in exhaust in reply to Tim B, 05-18-2005 20:33:27  
If you try to lean it out enough to eliminate the fire, you'll cause more problems than you fix (overheating, etc.). Little bit of flame is fine- a foot is probably too much. Won't really hurt anything except fuel economy.



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Allan in NE

05-18-2005 19:06:14




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
SD,

All those old gasser fire breathers shoot the flames. Don't worry about it.

Kinda pretty at night. :>)

Allan



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NC Wayne

05-18-2005 19:05:41




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 Re: Fire in exhaust in reply to Smart Deere, 05-18-2005 18:41:01  
I can't speak from experience on this like many of these fellers can but I remember many times hearing my dad talk about his grandpa's B model Deere doing the same thing. He said it was always the most noticable in the evenings, just about dusk, when they were headed home from the fields. I don't know how many years they ran it on the tobacco farm but I've never heard him say anything about them having to fix it because of this.

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