He checked my burner on his stove and sent me vid of it working perfectly,, he gave me some tips to try on priming and how much fuel to have in the tank,, very helpful guy.
@Neil Headwhipper Hi, just to understand, what exactly were you doing wrong to have the burner running yellow? Thanks, Nicola
Hi I wasn't priming it long enough also running with too much fuel in tank,, presscall recommends 3/4 tank,, works perfectly,, a great help,,
Good work John @presscall ! An act of kindness. Just checked the formal instructions and the say fill the tank!!! https://classiccampstoves.com/threads/british-military-no-12-instructions.27031/ Best Regards, George.
@kerophile English is not my language, but “fill the tank” is not “fill completely the tank” correct? Usually filler caps don’t allow over filling, not sure in this model because I don’t own one. Probably somewhere is specified the correct and max amount of fuel to fill in the tank? Nicola
@kerophile Thanks George and well spotted regarding the ambiguity of the instructions! It could easily be taken literally and the No.12 can be overfilled, with none of the subtleties of Primus or Optimus filler risers protruding into the tank. I think too, for someone unfamiliar with stoves, the point at which the non-return valve activates can be elusive and it’s possible to deceive oneself that pump strokes are pressurising the tank when they’re not. So whether Neil had completely filled the tank resulting in no air pocket to pressurise, or was unaware of the ‘feel’ of a NRV activating and pump strokes were ineffective, the consequence was no, or very little, fuel pressure at the burner. A perfectly good burner was unsurprisingly incapable of producing anything approaching blue flames from the trickle of fuel reaching it. The No.12’s comprehensive windshielding - fine for a stove in use - inspires over-confidence that it’s good for burner priming, but it’s not. Even a slight breeze into the open, un-shielded, front can disrupt priming flames and leave the burner at too low a temperature to vapourise fuel. John
You were also willing to seek and accept advice, and thus you were instrumental in finding the solution. That's not a problem at all.
@presscall thanks John as always for the great explanation! The verb “to fill” is “riempire” in italian and literally have the same meaning “to fill completely something”. In common language, anyway, it can be used to say “fill it partially, fill it up to the limit” etcetera. So when we say “riempi il serbatoio”, “fill the tank” is not immediately clear the exact meaning, like in English. So probably who wrote those instructions, wrongly, thought not necessary to specify the amount of liquid to fill in the tank, considering maybe as “common knowledge” the fact that the tank shouldn’t be filled totally. Nicola
Thanks for the insight into the Italian equivalent Nicola, which explains how the English expression could be misinterpreted. The author of those No.12 instructions does indeed appear to have been unhelpful in omitting the fuelling instruction ‘no more than 3/4 full’ as entered in every printed or on-tank instruction I’ve seen. Well, not strictly true. I’ve what I think may be a No.12 prototype submission from a company who lost the contract to TOC where the instructions label, though smaller in size than the TOC equivalent, has the identical wording of ‘Fill the tank’ and no mention of how full.
So, when we fill our house or shed of stoves, is a good idea to leave empty 1/4 of the space, to be able to breathe and still access them This to underline, that in common language, is very rare to use the verb “to fill” literally. When we fill a glass of water, is never fully filled… and so many examples… I am entering into the head of the person who wrote those instructions Nicola
I have to say I think I will only half fill in future when trying to get them to work after reading this thread
I have to admit, that when dealing with beer, and not water, the pint glass is always fully filled up to the edge Nicola
Parts Manual, Inspection, and instructions. https://assets.publishing.service.g...555928/20160921-FOI2016_08547_publication.pdf
