In spite of my lack of interest in acquiring more stoves, I could not walk away from an Optimus 00 I found at an antique store. I currently have no other 1 pint stoves, having given up and sold a Primus 210 that I could not stop from leaking at multiple points. I replaced the fuel cap gasket, the NRV pip, the lead riser washer, and both spirit cup/burner washers. There are no leaks and the stove burns well for a while. After 5 or 10 minutes the flame extinguishes. If I clear the jet it burns well again for another 5 or 10 minutes. I removed the burner and heated it with a propane torch and blew air through it with the air compressor. I am not sure about how hot my torch is, but I also don’t want to melt the brazing on the burner, which I don’t think my torch could do. I cleaned the outer burner tubes with abrasive pipe cleaners and nothing came out of them; they appear clean. The inner tubes I can’t get at mechanically. The tank is clean and no residue comes out with cleaning alcohol. I am halfway through the second tank of good fresh, clear k1 kero, but the behavior remains the same. Burn for awhile, extinguish, clear the jet, repeat. Thoughts?