Can I use a 6" liner on a Buck model 91?

[Woody Stover]

regency 5100 the techs say you can overheat the stove and crack the top if you run undersized liners

Did they explain why, or detail the conditions under which that might happen? Too much draft, or too little? When you are cold-starting the stove and ramping up temp in bypass, or when the stove is cruising in cat mode? I'd be interested to hear...

 

[bholler]

Did they explain why, or detail the conditions under which that might happen? Too much draft, or too little? When you are cold-starting the stove and ramping up temp in bypass, or when the stove is cruising in cat mode? I'd be interested to hear...

no they didnt and i cant figure out why it would to me to small a stack means to little draft and i dont see how that can cause over heating so i dont get it but that is what they said i will have to ask for more details next time i call

 

[trx680]

http://www.northerntool.com/shop/tools/product_200631935_200631935

something like this help?

 

[trx680]

If the Buck doesn't have one, I would get the cast flue collar.
(broken image removed)

Where do i find this 8 to 6 cast reducer?

 

[bholler]

something like this help?

no that does not increase draft it just helps get a draft established

 

[Woody Stover]

Where do i find this 8 to 6 cast reducer?

That is the 8" flue collar, not a reducer. The collar connects to the stove, then the reducer connects to the collar. (broken link removed to http://www.buckstove.com/partsstore/product.php?productid=264&cat=137&page=1)
The maker of your chimney should sell the reducer, I think. All components of the chimney should be from the same maker, to be sure they fit and work OK together.

 

[mellow]

Buck won't sell a reducer since they do not approve that stove running on anything smaller than an 8" flue. However, Appalachian whose stoves are very similar to Bucks sells a reducer, maybe one of the Buck guys can say if this will work or not.

http://www.appalachianstove.com/wood-replacement-parts.php

Pictures of it on my stove: https://www.hearth.com/talk/threads/appalachian-52-bay-wood-stove-insert.83621/page-2#post-1102587