I received a Pocket 96 code AV over a Z, 1956?, that was without the lipstick and a priming cup, but I had picked up a lipstick a few months ago from a member here who had one on Ebay. Amazing it mostly fit the burner on my new buy and works with a borrowed priming cup from my older 96. A question or two. Comparing that to my code M over 1 1923? 96, the lipstick sits a little lower in the hole of the burner but it will run with some yellow flame, but when a object is placed on top of the pot supports, the flame turns blue. Will this work in the long run? Is this the correct lipstick? It is a little wobbly, I've read that the lipstick sizes/shapes changed over the years. Do I have a few keepers? I had this stove going in 15 minutes with only assembling it and spreading the pump cup which needs replacing.
How much yellow? just a little? If there's no leaks and it goes blue when theres something on top cooking etc. I'd give it a thumbs up.
Some yellow on the tips, turns blue when a lid or pot is placed on the supports. My main concern was if I ran the stove very long, if the lack of a snug fit between the burner and the lipstick resulted in fuel failing to vaporize after a bit as the only contact point is at the top of the lipstick where it holds up the burner bell.
The jet hole maybe a bit big. Get a rounded off bolt in a vice to use as an anvil and tap the top with a small hammer to close it down a bit. If you go too far it's relatively easy to open it again with a normal stove pricker.
Thank you Henry, but is was advertised as a new lipstick by one of our members here who had it on Ebay. I'm happy with it, just as long as I have no issues if out on a backpack trip and it won't vaporize.
Heya Duane I have a couple of 96 that have sloppy fits between the burner bell and the lipstick. One is sloppy enough that the bell does not conduct enough heat back to the lipstick and, as you've surmised, it won't vaporize correctly. I've solved the problem on both stoves by keeping a small piece of brass shim stock in the tins with the stoves. When I assemble the stoves, I hold the piece of shim on the side of the lipstick and slide the bell on until snug. Works great and is a quick and easy fix. I bought my shim stock at the hardware store here in town. Hope this helps. Cheers, Gary
Hi All If anyone needs any brass shimming, i have got plenty of the stuff give me a PT if you want some ! Best regards Stu .
Thank you Gary and Stu. Gary, that is what I was thinking would have to be done if necessary. I'll have to run it next time I'm out in the garage playing, to see how long it works without a shim. Hardware store? I'll check them out.
Thank you kerophile, another point, unlike my older 96, the lipstick on this one does not penetrate the bell as much, so may not be an issue with the orifice size. Seems when I had the elder 96 going last Spring, it had some yellow flame, that may be the one that needs some whacking, but I am happy with them for now. If I make it to Oregon, I can bring them to have the experts look at them. I have a donor stove for my older 96, trying to swap out the pump tube if I cannot remove the NRV by brutal means.
Hi Duane, inadequate penetration (pardon the expression) actually causes lean, rather than a fuel-rich mixture and yellow flames. If you have limited penetration and yellow flames with your set-up, it looks pretty certain that your aperture is too large. An easy test is to get the stove running, then grip the flame-plate in a pair of pliers and carefully lift it upwards by a few mm. If the flame becomes blue (because of better air mixing) you have confirmed an over-rich mixture. Hope this helps. Best Regards, Kerophile.
Great idea, I'll have to try it this weekend. Thank you. Trying to keep all the yellow flame stuff straight, makes sense. Lean-too much air or too small amount of fuel. Just like an engine. How does elevation affect things? I live at 4000'.
Hi Duane, The Pr.96 is a great way to examine flame characteristics. Raising and lowering the flame-plate whilst the stove is running illustrates the importance of air/fuel mixture control on stoves. It can also indicate when the aperture in the lipstick is perhaps worn and too large. If you can change a yellowish flame to pure blue by rising the flame-plate you can be pretty certain that the aperture needs peening. Altitude will affect the air/fuel mix of your stove as the lower dense air will provide less oxygen for the flame. Have a look at this post of a Primus stove which can be "tuned" for different fuel quality, and perhaps oxygen content: https://classiccampstoves.com/threads/16107 Best Regards, Kerophile.
Duane George is quite right about flame plate height, when I was creating a silent burner for my Tilleymus, an idea from George I might add, getting the flame plate to the right height was an awkward process. See here how I got on. https://classiccampstoves.com/posts/153126 Bending the legs on the plate, seen in pics 3 and 4, was critical.
Thank you both, good to see you back by the way Henry. Henry, won't be any bending of the legs, they're cast. I'll play with my 96's this weekend, need to finish off the older with soldering in that part that holds the NRV, was waiting for a donor stove, which looks good too. I work away from home all week, so I have to remember what I have read during the week.
I was trying to illustrate the importance of height. Not suggesting you bend your's, I think you'd have a bit of a job on.
Lost in the translation of English. I located some thin brass stock, first I'll see if playing with the height makes any change before spending a small amount for the stock.
Hi Kerophile, As this subject comes up frequently why don't you post photo's of your fix in the Fettling Forum...remember you once said: Cheers, Rob
I fired up my Pocket 96, ran good, used my pliers to lift up the burner plate and it ran a little better, but made more noise which I thought was ok. Only got some yellow tips when I increased the pressure. I could put some clips on the plate legs I guess that would raise it less than a 1/4" would help. Later, I had too much snow to deal with this weekend.
