After I allow the stove to burn cleanly I give more pumps & I am satisifed it is burning cleanly by the flame colour. But I am still getting the black stuff deposited outside of the burner ring. The kettle is not getting dirty. If this stuff was coming through the generator you'd have expected it to have strangled the stove in minutes. The tank is clean, the fuel is clean. If the stuff is coming from anywhere could it be inside the mixer tube? I had no idea if they could get carbonised debris inside like a stove-pipe. I'll have to see how much one of those brushes would be. Boiling a kettle the stove makes the pan supports cherry red and throws sparks like I am burning wood.
Where can you get a spare (clean) fuel/air mixing tube from? How long ought it to take the stove to get hot & burn pure blue?
a picture would help - but if this stuff is getting in the generator it would have blocked the jet - have you tried stripping out the burner head? undo the 3 phillips screws clean the stack of flat and crinkle washers and the cap and have another go I have an inkling that might fix it
@Primus 96 , Old Coleman parts might have one, don't hold your breath!!! Take the tube and give it a good flush through, insects and spiders like making a home in those tubes!!! It's a common problem on the Coleman suitcase stoves as well! Murph
Do we refer to it as the 'J' tube, Bunsen Tube?? Whatever!! How do you clean out something with three 90 degree bends? I have had unwelcome guests in there before, but then the stove would hardly burn at all.. The burner head has been stripped several times now. It is as if the longer the stove is run this stuff is coming away from the walls of the tube and getting blown through the burner. Would you advocate I fill it up and just leave it to burn until it stops for lack of fuel?
Thinking of directing the flame of a gas blowtorch down the Bunsen. Maybe that'll blast any crud out? I assume it is steel.
Clean the manifold with compressed air, water, or pipe cleaners. Some hardware stores have long thin flexible brushes available as well. Fire would be one of my last choices.
I used the garden hose as I have no source of compressed air. I don't know what would go around the 90 degree bends and still clean the walls of the Bunsen. I need to go out and buy a can of Panel Wipe, so no more tinkering with it tonight. The thing is just about dry. It gets the burner assembly a dull cherry red, which seems OK to me on a short test. We will see how it is if I run it for a extended period.
I don't know what brand of Panel Wipe. You are looking for one that is Petroleum based. As I am going to get some I will look on the can anyway. It has probably been mentioned a fair bit if you search.
In the still air of that garage the Trangia 27 kettle is taking just 4 minutes to come to a very strong rolling boil. Three times I repeated that test with the same 4 minute result.
Has any UK member got an extra crinkled & plain ring to extend the burner? As that slitted ring is too deep, (because it is for the 500) what other enhancement is possible? Please send us a Private Message if you have the parts.
Do the "upgrade" burner rings actually work though? I mean fuel output is limited by things upstream of the burner, so unless the burner becomes substantially more efficient, it's not going to account for the substantial difference between my unimpressive results and those of others.
that is a good point - I am starting to wonder about that - but then with the bigger burner you might be able to 'over pump' the tank without the flame breaking away from the burner - but that might not make a difference in terms of heat output I need to get the 500 sorted and try a test but it would be a basic comparison nothing too elaborate
Fuel flow should increase by roughly the square root of the percentage pressure increase, so that might be an explanation. On a side note, I took apart the '84 yesterday for some cleanup. The generator is pitted and high-mileage on the outside, but the inside was completely free of deposits. There were no leaves or spiderwebs in the mixer manifold thing. I think this stove was likely working as intended during the boil test. I did find a very old spent penny match under the collar though. Sold on eBay within hours.
Rickybob:Thanks for the rings to 'supercharge' my 502. The postman didn't come until after I had gone out with the 502. You can see it is perfectly capable as a stove even without the extra rings. It has a brand-new generator and the yellow flames clear quickly. No cookery done yet.
