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AR15.COM
4/16/2010 3:34:30 PM EDT
I have a Coleman Exponent multifuel stove that I love and has always worked very well. Lately it has not been pressurizing properly. Seems that the fuel is just burning with a yellow flame. Not the usual blue flame. All parts seem nice and tight and in good condition. Anyone have experience with these and what could be the problem? Thanks,JEFF
4/17/2010 6:02:24 AM EDT
[#1]
dirty. or old fuel.

try a good cleaning.



if it was a pressure issue it wouldnt work or run long.
4/17/2010 8:44:25 AM EDT
[#2]
From the manual,

To light
A. USING COLEMANĀ® FUEL
or UNLEADED GASOLINE
■ Shield stove from high wind conditions and hold lighted
match to burner bowl.
■ Turn black CONTROL KNOB counterclockwise to
HIGH position. (Fig. 5)
NOTE: If stove burns with a high yellow flame or if liquid
fuel appears in the burner, turn Control Knob OFF and
allow flame to burn out. Review instructions before
relighting.
■ After stove lights, pump an additional 15 to 30 strokes
of air into tank. It may be necessary to repump stove
occasionally during use for full heat output, especially
when the control knob is on HIGH. If stove is hard to
light or burns with reduced heat output on HIGH, quickly
turn the control knob OFF to LOW several times to clean
the generator gas tip.

Yellow flame typically means fuel is in the combustion section of the burner and needs to dry or burn out. Just had this happen yesterday testing a Coleman two burner stove with fuel older than I care to admit.
4/17/2010 12:43:23 PM EDT
[#3]
If you have used it a lot, your fuel line could be blocked with deposits. You might spray carburetor cleaner in the fuel line and see if it helps.