Hello everyone, I’m new to using gasoline stoves and am currently learning the ropes. I recently purchased a Coleman 533 in “needs repair” condition. During my test run, a significant amount of gasoline leaked from the end of the generator opposite the control valve and ran down the stove. The stove also made a spluttering noise. Additionally, I noticed that the generator has a gap behind the retaining clip. Is this normal? I searched a lot on the internet but can't find any image or video that show the insertion of the generator on the far side of the valve. Is there a gasket? Any advice or guidance would be greatly appreciated! Thank you in advance! Best regards.
Those stoves are really easy to flood, and then fuel runs down the tank. The solution is to follow the lighting directions to the letter. They key phrase I was missing (mine always flooded) was to HAVE A MATCH AT THE BURNER before opening valve. Here is what the instructions say: ■ Hold lit match at BURNER, then turn RED FUEL LEVER to high (LIGHT) position. (Fig. 9) They also need a LOT of pumping both before you light it and after it is first lit. Let us know how it goes!
The gap is normal. That's where air mixes with the fuel. +1 on following the instructions, and pumping. I often do upwards of 100 pumps with the 533. Will send pics of correctly assembled stove when I get home.
I also have the exact same leaking with a new 533. From the base of the generator tube, where it is connected to the valve assembly. Nut tightening doesnt help. I am used to operating the 442, which is essential the same, but no problem. Tried a new generator - same problem. Please help! I dont know what to try next .
Look at the face of the flare on both the generator and valve end. It should be clean, smoothe, and crack-free. If it is not clean, remove all debris with a clean rag. If it's not smoothe, you can carefully clean it up with some high grit sandpaper, at least 300 grit. If there is a crack, replace the cracked part. Replacements are available at oldcolemanparts.com. Finally, ensure that you are not overtightening the flare. The flare should be as tight as you can get it with 2 fingers, with a wrench that is 6 inches long.
There is your problem. Those surfaces need to be smooth and properly shaped. If they don’t fit surface-to-surface without kinks, grooves or deep scratches, the seal will leak. Tony
Thanks Tony, I should then just use a new generator with a nice clean flare and all will be cool, right? .. Well, here is the new one I had lying around... looks good? Well, I fitted it, and it still leaks . ... i just dunno anymore ... PS BTW, the original gen, at didnt look ideal, was new in the 533 straight out of the box,,,
I'm confused (happens a lot) your original post says it "leaks opposite the control valve" isn't the flare we are looking at, at the control valve? Maybe a picture of stove with something pointing at leak, I'm a simple enough guy that I like pictures
Magicwrench, Latman isn't the OP. Different problem than the OP. In your picture, the valve's flare face also looked pretty bad. Take some fine grit sandpaper, at least 300 grit (I'd start with 240 grit, until the deep scratches were gone, and switch to 300, then 400), and sand out the scratches.
This is going to sound stupid...but what fuel are you using? I just helped a guy with a coleman 400 that was in Europe... ended up the previous owner used kerosene in it and it caused a lot of flooding and problems. Once cleaned out it was fine as coleman fuel or white gas vaporizes better and the stove runs well. What fuel is in it? Also try preheating the generator with the stove off first. Run a torch back and forth across the generator (sometimes the burner will light momentarily as the fuel in the generator vaporizes) Once its nice and warm...keep the torch on the burner and open it up. Let me know what happens @grillpep
