I am working my way through a 210 that has been restored for show, but not (apparently) for use. It was running fine (see 'is this ok' thread), but I noticed that it took a few more pumps to get up to pressure than I would have expected. It 'felt' like there was an obstruction in the burner. I stripped the burner and soaked it in vinegar for an hour or two. I soaked the jet seperately. I used a high pressure air pump to blow out the burner, but when I blow air into either of the two tubes there is no air (or very little) exiting the jet hole (the jet is still removed). Any thoughts on what to use to unblock the tubes? If push comes to shove I'll use another 210 burner and retire this one to the shelf, but I'd rather make it work. Cheers GC
thermal shock? AKA; I just posted bout this earlier, but, after soaking in the vinigar, drop it into boiling hot water. It might break up said gunk.
one pot Give that a try and if all else fails post it to me and I'll give it the old Oxy/acetylene treatment Henry
Henry I saw your posting ages ago abot the ovy trick. So I got thinking about this, Not haveing an oxy kit any more. So I heated the burner upto a dull red after removeing the jet, then put compressed air though it. sparks went every where. started to burn some timber I had in my shed. I got that out quick smart. But the burner worked a treat after that. Thanks for the sergestion.
Burners can be cleaned with heat and water presssure. Remove the burner from the rising tube. Remove the nipple. Get a bucket of cold water. Support the burner on a rod or wire and heat it with a blowlamp until it glows a dull red. Watch the joints because some are made with low temperature brazing If you see a bright brass colour at the joints remove from heat immediately. Otherwise keep it hot for a few minutes and then quench it in the water making sure that no openings face towards you. Flakes of black stuff should shoot out of the burner. A plastic garden hose screws on to the threaded portion. Empty the water out and turn the tap on directiing the water into the bucket. You should see more flecks of black stuff in the water. Continue this cycle until no more black stuff comes out. Replace the nipple renewing it if the old one is worn. Reassemble and your burner should function properly. OBVIOUSLY YOU DO THE HEATING OUTSIDE AWAY FROM ANY INFLAMABLE MATERIAL
Cheers guys, I soaked it in vinegar and then hot water for ages and gave it a blast through with the air pump (with the hose screwed onto the threaded end of the burner). I got some air through so thought I'd reassemble and give it a go. The stove lit and burned very well. However, there is definitely a need to pump up the pressure before it lights. It doesn't seem to build pressure as quickly as other stoves I own, but it burns great when it does light (see new pic in the 'is this okay?' thread). What prompted my panic was that when I cleaned the burner of my OPti 45 the other day and pumped air through it, it was very obvious that the air was getting through the burner (it sprayed vinegar all over my boot). However, the 210's burner is smaller so perhaps I was expecting too much from it? I like the red-hot and quenching idea though... I'll try that with some other burners. Cheers GC
The jet size of the nipple is the same as a 45. That is the size that takes a 0.32 mm pricker so the amount of liquid should be the same providing that the pressure is the same.
I was blowing through with the jet removed in both cases. The 45's burner tubes are much heftier than those of the 210, aren't they? The whole subject of burner and jet sizes perplexes me somewhat. I think I need to get me a new set of prickers and start again from scratch. This has to be better than my aimless shuffling of a boxful of prickers until I find one that 'fits'. GC
The simplest rule is that nearly all 1 pint and 2 pint stoves take the bigger nipple which takes a 0.32 mm pricker. There are exceptions. Some British stoves made in the 1970s were originally fitted with the smaller nipple which takes a 0.23 pricker. This seems to have been to ecomise on fuel because there was an oil crisis at the time. The note on the instructions was added by a ribber stamp rather than the instruction being included in the printing. Those stoves work better with the larger nipple The nipple which takes a 0.23 mm pricker was fitted to Optimus 8s, 80s Primus 71s and other small petrol stoves. These do NOT fit R versions of those stoves. The 2 pint stoves can only put out the same amount of heat as a 1 pint stovbecause the jet can only allow the same amount of fuel through but the flame spread is much bigger so a larger part of the pan is heated
