425F nearly never used, maybe lighted once or twice. I tried to light it up and seemed to work fine. Lever up, light it up and after a munite lever down, right? Ok, so then came the disaster. The flame turned yellow, I thought lever was up for too short time but it was not the remedy. Finally I decided to disassemble the generator-valve assy. It was a black stuff inside the valve nut (carbon?) I removed it from inside the jam nut and cleaned all well. Then put a new seal and... Now it won't light up. It's impossible. I hear gas and a kind of wind comes from main burner but no flame at all... suggestions? thanks xavi
......... Could be , its not picking up fuel ??.... Why ?? ... I dont Know these stoves . Wait for a Coleman Suitcase Type Stovie to come along ... Nick
It sounds as if it's low on fuel. What are you burning in it? The 425 series does best on fresh Coleman Fuel or equivalent. Another thing, before lighting it needs to be pumped at least 40 full strokes, 50 are better. After it lights, pump until you feel resistance. Colemans are almost impossible to over pump. Are you familiar with the Coleman pump? Unscrew the knob three full turns before pumping. Hold your thumb over the hole in the knob while pumping, then close the knob/ pump valve snugly, but not hard afterward. This is necessary each time you pump it. If you run the stove for an extended period, you may notice the flame lessen. If this happens, pump it up again. It is normal. Take the generator (vaporising tube) off and check to see that the cleaning needle is clean and in good condition as well as the spring inside the tube. The spring is a heat sink to help vaporise the fuel. The wrong fuel will make a black mess in there and the stove will burn poorly, if at all. By the way, the 425's are as close to bulletproof as a gasoline stoves get. I love 'em. My first "real" stove was a 425C with the red wire fold down feet. It has lasted over 40 years and shows no sign of giving up any time soon. Good luck, Gerry
Make sure someone didn't fill it with kero. that would really mess it up. Clean Coleman or equiv as previously stated. I think you guys have panel wipe? or is that a UK only thing?
Hi I have another 425E and work fine, I'm familiar with that kind of stoves. Fuel level is ok, I pumped and pumped... And used Optimus stove fuel. Brand new, the seller said it's the same white gas as Coleman fuel... All my other Coleman fuel devices are working on this fuel ans they work great... Thanks guys!
Hello, xavi, I do not know much about the Coleman valve assembley, but I would hazard a guess. I do not know how much you disassembled the valve assembly, but is it possible that you left a tiny spring out, when you put it together? If you can hear the hiss of the air, but no fuel is coming out, then maybe the little spring that lifts up the pin valve that allows the fuel to escape is down. I have never actually disassembled the valve at thefuel tank, but I have done it on military version of the single burner stove. I think they both share the similar design of the valve. On the military valve, the pin valve is moved up and down by rotating the large knob. For 425, the equivalant would be the tiny "L" shaped lever. If you disassembled the fuel pickup tube on 425F, then it is possible that little spiring was left out. It happened to me, and what you describe is almost exactly what I experienced. But I maybe wrong.
OK, let's back the truck up a little. You can hear the tank making sounds. Since we are dealing with a stove, remove the tank. Pump it up so you know you have pressure. Rotate the cleaning lever a few times. Does the generator nozzle spray a fine stream of liquid fuel? It should. If not, start there. Can you trace the sound? Is it from the nozzle tip? If so release the tank pressure and unscrew the valve body from the tank. Check if the tube going to the bottom of the tank is intact. If it is loose, corroded through, or short, it is not drawing fuel from the tank, but air from the top. If that is intact, it's inside the generator, but I suspect you are having problems inside. If it is making the hissing sound, but you have no fuel to the burner, it's drawing air. If toy have a fuel stream, the your problem is in the manifold, and I'd suspect you have spider or muse nests soaking up the fuel so it's not getting to the burners, disassemble the burners and use air pressure to blow the manifold clean.
http://www.oldtownyucca.com/coleman/tech/re_stove_c.htm I read from that site that I should put a packing and I put a seal... maybe this is the reason... I don't know what a packing is and where to find it in Spain...?
The packing is that black stuff on the valve stem. That would need replaced rarely. The generator is far more likely to fail when not using coleman fuels... Did you dissasemble the valve?
The packing is a Graphite tube, but a good substitute is a length of Hi temperature Graphite string, sold in plumbing shops. Some have also used PTFE tape, also from the plumber. If you need Genuine Coleman parts, Let me know. I'd be happy to foward them to you. Look on Coleman.com, under 'Order parts'
In addition to all of the above. Have you checked the pump valve? Since the cork/metal spacer was replaced the cheap rubber gaskets become useless if they are not lubricated and dry out. Look at Amazon.com "Coleman stove parts"
I agree, it sounds like it's no longer picking up fuel. If it has been sitting for a long time, the fuel could be old. Try what was mentioned earlier and take off the fuel tank and see if it puts out a stream of fuel, if not, its not picking up fuel. You may have to remove the valve from the tank and clean the fuel pick up tube. Yellow flames can also mean the air tubes are clogged. Take off the burner caps and run a pipe cleaner or fine wire through the manifold and air tubes to check for spider webs. Unless it's been very abused you should not need to replace any parts other than the fuel cap gasket. You can also refer to Doc Mark's account of rehabbing one of these stoves in the CASG #8 campout thread. Wow! I didn't say anything that hasn't already been said!
Often you need to leave the lighting lever up for longer than 1 minute or you will get yellow flames. It may also help to light the second burner until it warms up. On some stoves with minor problems that can help get a blue flame faster. The generator tip could be enlarged, which can lead to a yellow flame, but that is unlikely with a stove that hasn't been used much.
