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[CountryBoyJohn]

I noticed some flames coming out of the stack on my 5000e tonight.  I had one hell of a fire goin in it.

Are you sure it want a chimney fire? I've never had flames come out of mine except when I did have a chimney fire. That's write a feat to make it thru 3 bypasses.

[big cat]

Wasn't a stack fire, I think RSI hit it on the head. Its definitely being forced by air out of the stack. My unit has the straight fire box stack and hinge/turnbuckle/flapper blower. I'll get a piece of steel plate to restrict the airflow, since my flapper is already set at a 1/2 inch or so. I would think this should save on wood too, no?

[RSI]

It should use less wood when not doing it.

I would start by covering the back part of the grate. You may need to slightly change the way you load it afterwards so the coals are over the remaining grate. You should be able to lower the flap more. It doesn't take much of an opening on the inlet side of the fan to give it a lot of air.

They used the same fan on models up to the 325 which was about twice the size, so it is easy to give the 175 way too much air.

[AirForcePOL]

I noticed some flames coming out of the stack on my 5000e tonight.  I had one hell of a fire goin in it.

Are you sure it want a chimney fire? I've never had flames come out of mine except when I did have a chimney fire. That's write a feat to make it thru 3 bypasses.

It is possible but I don't think it was a chimney fire.  I could barely see the flames but they were coming out about 6 inches or so.  I had the firebox pretty full and some good flames coming from the font of the stove. 

[LittleJohn]

NOTE!!!

I had flames shoot out of my stack this weekend 
Apparently you should not try to load wood into OWB, immediately following a burn cycle. extra oxygen from door being open, did not help things