Chubby Stove temps running high

Post by **Lightning** » Sat. Nov. 27, 2021 9:19 am

Can you "smoke test" the stove? Just go around the stove close and slow with an incense or lit cigarette to see where it's pulling air in...

steveleslieg · Post by **steveleslieg** » Sat. Nov. 27, 2021 10:00 am

The chubby is not air tight. Here is another video showing air intake.
What happens If Draft is not regulated.

https://vimeo.com/manage/videos/650604617

mof1964 · Post by **mof1964** » Sat. Nov. 27, 2021 2:34 pm

I was gone from 730 this morning till about 1pm. In that time the stove temp has climbed to 500 and appears to be holding there.
We are having pretty windy conditions here today, so I'm thinking that it's the super draft issue that Larry talks about.

steveleslieg · Post by **steveleslieg** » Sat. Nov. 27, 2021 3:24 pm

If I was closer to you - I'd measure the draft of the chubby
New grate, mica and gaskets.
I will fire up tomarrow.

.JPEG | 1.2MB | IMG_0008.JPEG

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mof1964 · Post by **mof1964** » Sun. Nov. 28, 2021 3:02 pm

ok starting to think it could be the coal?
I did my nighttime shake and load last night about 830pm.
didn't need to do anything with the stove till about 1230 this afternoon and probably could have left it be for a bit longer. it was holding 400 since i first checked it this morning at 730
i didn't shake anything, just poked 4 spots underneath to see a little orange glow and then added 2 heaping scoops of coal.
fire is now at about 550 and holding.

mof1964 · Post by **mof1964** » Mon. Jan. 03, 2022 3:17 pm

So back at this chubby running hot. I contacted Larry @Chubby stoves.
I have followed the direction he gave me. Everything I'm doing is by the book and I have not found any air leaks.
I just fired the stove back up again yesterday. Built the fire - got it going and when stove temp was reading about 180 degrees I filled the pot to the top and closed the door. It took some time, but the stove again settled in at the 500 to 550 temp.
I can't get the temp down to 300 to 350.
I'm using Kimmels nut coal. The pieces are large. On the upside, I can get 15hs out of the stove at that temp before it needs any tending at all.
it would be nice to be able to idle the stove down to the lower temps for the warmer days.

Post by **Lightning** » Mon. Jan. 03, 2022 3:21 pm

I didn't read thru the thread but are you using a baro or manual pipe damper?

Do you have a manometer hooked up?

mof1964 · Post by **mof1964** » Mon. Jan. 03, 2022 3:23 pm

Lightening: I have a manual pipe damper and a baro installed per the instructions

Hounds51 · Post by **Hounds51** » Mon. Jan. 03, 2022 3:47 pm

mof1964 wrote: ↑
Mon. Jan. 03, 2022 3:17 pm
So back at this chubby running hot. I contacted Larry @Chubby stoves.
I have followed the direction he gave me. Everything I'm doing is by the book and I have not found any air leaks.
I just fired the stove back up again yesterday. Built the fire - got it going and when stove temp was reading about 180 degrees I filled the pot to the top and closed the door. It took some time, but the stove again settled in at the 500 to 550 temp.
I can't get the temp down to 300 to 350.
I'm using Kimmels nut coal. The pieces are large. On the upside, I can get 15hs out of the stove at that temp before it needs any tending at all.
it would be nice to be able to idle the stove down to the lower temps for the warmer days.

I didn't get a chance to read all the threads, but did you try a second thermometer? I always double check my unusual temps with a second thermometer. If so, then you must have an under-fire air leak. Shouldn't matter what size or brand of coal you use those temps seem rather high.

Post by **Lightning** » Mon. Jan. 03, 2022 4:03 pm

Hounds has some good points there.. other than those you can try closing the MPD more and/or move the weight on the baro so it opens sooner. This will reduce your draft which effectively reduces your combustion air coming in. But if you have unknown unregulated air getting in under the fire somewhere, squelching it by cutting draft is only a bandaid to the problem.

waytomany?s · Post by **waytomany?s** » Tue. Jan. 04, 2022 11:57 am

mof1964 wrote: ↑
Mon. Jan. 03, 2022 3:17 pm
So back at this chubby running hot. I contacted Larry @Chubby stoves.
I have followed the direction he gave me. Everything I'm doing is by the book and I have not found any air leaks.
I just fired the stove back up again yesterday. Built the fire - got it going and when stove temp was reading about 180 degrees I filled the pot to the top and closed the door. It took some time, but the stove again settled in at the 500 to 550 temp.
I can't get the temp down to 300 to 350.
I'm using Kimmels nut coal. The pieces are large. On the upside, I can get 15hs out of the stove at that temp before it needs any tending at all.
it would be nice to be able to idle the stove down to the lower temps for the warmer days.

How long?

waytomany?s · Post by **waytomany?s** » Tue. Jan. 04, 2022 12:00 pm

Lightning wrote: ↑
Mon. Jan. 03, 2022 3:21 pm
I didn't read thru the thread but are you using a baro or manual pipe damper?

Do you have a manometer hooked up?

You were the first to post after thread was created.

Post by **Lightning** » Tue. Jan. 04, 2022 4:08 pm

waytomany?s wrote: ↑
Tue. Jan. 04, 2022 12:00 pm
You were the first to post after thread was created.

Yeah.. I have a case of sometimer's on occasion

mof1964 · Post by **mof1964** » Tue. Jan. 04, 2022 7:14 pm

I have tested with a lighter around the base of the chubby to look for external air issue but haven't found any.

tcalo · Post by **tcalo** » Tue. Jan. 04, 2022 8:20 pm

It has to be an air leak below the grate if you can’t get the temps down!!