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17-11-2011, 10:08
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#1
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Marine Service Provider
Join Date: Nov 2008
Posts: 1,249
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Black Soot on My Pots and Pans
I've been getting a black soot on the bottom of my pots and pans lately. If you see the attached photos, the flames have orange tips. If I remember correctly, that means there's probably a blockage somewhere, but where?
Is it really that likely that there would be one in both of the burners on the stove? Especially when I usually just use the one on the left? So where else could it be? It's not like the lines are ever disconnected at the fittings, to allow anything in, and I can't imagine something getting into that end that connects to the tank.
Could it be something else? Could it be a problem with the regulator for instance?
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17-11-2011, 10:13
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#2
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Senior Cruiser

Join Date: Apr 2004
Location: Toronto
Boat: CS36Merlin, "La Belle Aurore" Ben393 "Breathless"
Posts: 7,269
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Re: Black soot on my post and pans.
Remove the orifices, soak in alcohol, replace. Also clean the holes in the burners (I'd do this first).
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17-11-2011, 10:34
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#3
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Senior Cruiser

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,887
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Re: Black Soot on My Pots and Pans
I get this from time to time in my home propane stove. Go figure. then it goes away. My guess is contaminated propane. Does water build up in propane tanks? Your flames look great compared with mine! The orange is an inch long on mine sometimes.
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"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
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17-11-2011, 10:35
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#4
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Senior Cruiser

Join Date: Apr 2004
Location: Toronto
Boat: CS36Merlin, "La Belle Aurore" Ben393 "Breathless"
Posts: 7,269
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Re: Black Soot on My Pots and Pans
Caused by improper propane/air mix, usually obstructed holes in burner or dirty orifice.
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17-11-2011, 10:43
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#5
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Senior Cruiser

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,887
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Re: Black Soot on My Pots and Pans
Yeah, brand new fancy SS stove with commercial grating top.... when it starts, does it on all 5 burners like mentioned above. Then gets better on it's own....
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"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
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17-11-2011, 10:44
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#6
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Senior Cruiser

Join Date: Dec 2008
Location: St. Georges, Bda
Boat: Rhodes Reliant 41ft
Posts: 4,131
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Re: Black Soot on My Pots and Pans
Check the little vent screen on the bottom of the regulator. If not unrestricted, can impair the diaphram movement and richen the mixture. Orange is unburned gas, just like a candle.
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so many projects--so little time !!
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17-11-2011, 10:58
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#7
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Senior Cruiser

Join Date: Aug 2006
Location: Skagit City, WA
Posts: 19,887
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Re: Black Soot on My Pots and Pans
I'll do that... it is outside, fairly close to the ground... thanks!
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"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
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17-11-2011, 11:01
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#8
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Mooderator

Join Date: Jul 2010
Location: Key West & Sarasota
Boat: Cal 28 "Happy Days"
Posts: 4,211
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Re: Black Soot on My Pots and Pans
Might also be jetted for a different gas like CNG
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Any fool with a big enough checkbook can BUY a boat; it takes a SPECIAL type of fool to build his own! -Capngeo
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17-11-2011, 11:09
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#9
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cat herder, extreme blacksheep

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,976
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Re: Black Soot on My Pots and Pans
over time, the propane stoves need service a lil .... they do this..... the soot comes off with cleaning!! soap and water do mine fine---when it increases, i clean jets and burners.......so far, so good, soot happens--i get some from non stove sources also....
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17-11-2011, 11:15
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#10
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Registered User
Join Date: Aug 2010
Location: Houston,Tx
Boat: Maxum 37'
Posts: 1,587
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Re: Black Soot on My Pots and Pans
Quote:
Originally Posted by Vasco
Caused by improper propane/air mix, usually obstructed holes in burner or dirty orifice.
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Plus 1, also keep in mind if the flames are orange, they are giving off CO, (carbon Monoxide). I would make cleaning the orifice a priority.
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17-11-2011, 11:34
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#11
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cat herder, extreme blacksheep

Join Date: Jul 2008
Location: furycame alley , tropics, mexico for now
Boat: 1976 FORMOSA yankee clipper 41
Posts: 17,976
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Re: Black Soot on My Pots and Pans
all flames give off co--an also use the oxygen in boat to create co2 of the co so there is nothing left to breathe--must always have open hatch with cooking.
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17-11-2011, 14:33
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#12
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Registered User
Join Date: May 2009
Location: Lorient, Brittany, France
Boat: Gib'Sea 302, 30' - Hydra
Posts: 1,229
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Re: Black Soot on My Pots and Pans
Sometimes, yellow flames and black soot are caused by a small leak in the metal pipes inside the stove, between the valve and the burner, resulting in insufficient pressure and incorrect air-gaz mix.
I have seen this on an Eno stove. It was cured by a change of piping.
Alain
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17-11-2011, 15:36
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#13
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Marine Service Provider
Join Date: Nov 2008
Posts: 1,249
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Re: Black Soot on My Pots and Pans
Quote:
Originally Posted by Cheechako
Your flames look great compared with mine! The orange is an inch long on mine sometimes.
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Bad iPhone photo. The orange is a little longer than it appears there.
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17-11-2011, 16:09
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#14
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Registered User
Join Date: Dec 2010
Location: Back in Scotland!
Boat: Gib sea 43
Posts: 843
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Re: Black Soot on My Pots and Pans
i had an eno stove do the exact same, the lower metal fitting was slightly bent interrupting the air flow causing very orange flames and lots of soot if its not seated right you will get the same problem.
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18-11-2011, 11:21
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#15
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Registered User
Join Date: Aug 2010
Location: Houston,Tx
Boat: Maxum 37'
Posts: 1,587
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Re: Black Soot on My Pots and Pans
Quote:
Originally Posted by zeehag
all flames give off co--an also use the oxygen in boat to create co2 of the co so there is nothing left to breathe--must always have open hatch with cooking.
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Yes and no. A properly adjusted blue flame is an indication of complete combustion, and will give off very little CO, (a few parts per million), and mostly CO2 And H2O.
An improperly adjusted flame will give off many times the CO, (hundreds or thousands parts per million of CO), Carbon Monoxide | Indoor Air Quality | US EPA
Over 50ppm will cause poisoning symtoms, headache, etc... over 200ppm is dangerous.
Levels above normal can accumulate in a poorly vented area, and reach life threatening levels very quickly. Way before Oxygen levels drop. The soot on the pans is a first indication of incomplete combustion.
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