Question about Coleman Propane Grill Stove 9921-700

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Why is my stove causing a thick coat of soot to buildup on my pots?

My 2 burner propane coleman stove is burning yellow orange and a black soot like coating is developing on my pans. The black coating is so thick that I can't clean it. It smears all over everything and won't come off. What can I do to fix this problem?

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  • louisboy Sep 08, 2008

    i have the same problem but don't think there is an air intake adjuster.the line runs directly from a 20 lb. bottle.there is however an oily reddish,orange discharge in the regulator and line when i disconect the line.

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You have to adjust the air intake holes at the valves. this will give you a blue flame.

Posted on Aug 19, 2008

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A yellow, sooty flame indicates either too much fuel or too little air. Too much fuel can be caused by a faulty pressure regulator that is leaky or stuck open, in which case a new regulator from Coleman would be needed. Too little air is caused by restricted air ports by the individual valves where the gas jets feed streams of gas to the burners. Potentially, these areas could get clogged by spider webs or insect bodies and should be cleaned of foreign matter.

Are you running the stove at high altitude, for example, over 3,000 ft above sea level? Less air at this altitude will result in a richer, yellow flame. If the air ports can be opened wider, this may correct the condition; if the air ports are already fully open, the only thing one can do is turn the gas volume down and make do with a smaller flame. In the latter case it would be a design limitation of that model of stove and probably not correctable by the user.

Since you seem to imply that both burners are exhibiting this problem, I would suspect a regulator problem or need for re-tuning for high altitude operation.

Posted on Jan 28, 2013

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