As you can see in the photos, this Monitor #15 2-pint burns with a severe yellow flame. I have gone over the stove multiple times searching for air leaks. The jet was replaced. Serviced and tested the NRV and safety valve for air leaks The burner washers/seals were replaced. I viewed the burner tubes with the aid of a magnifying glass. No cracks were found. When I remove the burner and blow through it, there is good air flow. When I heated, and then forced compressed air through the burner tubes no carbon came out. I removed the burner and mounted it on to a well-known 2-pint stove with the same results. I tried shutting the stove off and relighting it at low pressure, and it flooded. Looking for suggestions of things that I may have missed. David L
Maybe a hairline crack that only shows up when hot. What happens if you lift the outer cap one mm when running with either pliers or two screwdriver blades? Can we see a photo please of the inner cap and the outer burner cap? Is it yellow right from the start? What size is the orifice?
Hello, on the first picture it looks, if it's short before burning blue, the second one, looks to cold or a jet with a to big hole. Try to heat one cup more, and get a (old not using)pot on the stands to reflecting the heat. Have a nice weekend. RJ
Some inner and outer caps just don't work with each other, or a particular burner. It is often more magic than science.
It amazes me about how much testing was done so many years ago, figuring out the design not only of these stoves, but cap configurations. Duane
One other thing to try: Put you inner and outer caps on a hard, flat surface and check that they sit evenly with no gaps above the surface. If there are any, carefully make the bottom of the caps even by rotating the caps on fine emery paper. I recently fitted a NOS Companion outer cap to a stove and it ran yellow on one side: there were slight dags of metal on the bottom edge of the outer cap from manufacture that passed quality control. I cleaned it up with 800 grit emery paper and it worked fine. Also… Is the nipple fitted properly and firmly? Tony
Please excuse the lag time in replying. Since posting, I have been avoiding this stove. To much time spent sitting close to a malfunctioning stove resulted in time needed to clear my lungs. If I use very low pressure when first starting the stove there are indeed the beginning of blue flames, but then the stove flame simply dies. Jet size 0.23 MM The jets threads were coated with GASOLIA before being screwed in A second priming resulted in no flame improvement Inner and outer caps seem to sit flat. Lifting the outer cap, using two pieces of scrap copper showed some flame improvement. I am currently looking through my collection for an appropriate sized set of burner caps to try. I have not yet tried using the stove trivet and pan of water, to see if that causes changes the flame pattern. Since the outer burner cap is marked with the manufacturers name, I cannot tell if the current outer cap has been replaced. None of the Monitor 2-pint stoves that I see in the "Stove Reference Gallery" display the Monitor name? David L
A couple of tips- the jet orifice sould be 0.32mm on this size of stove. Anything other than blue combustion means carbon monoxide is being produced, which as you have found is extremely unhealthy. Shut it down if it burns in this state and make corrections. I'm not sure many, if any silent burner caps were ever marked Monitor?
I located a 0.32 MM jet MM from an Optimus burner Most of my 2-pint stoves use the smaller sized jet. With the exception of a couple of regulated burner stoves As you can see in the accompanying photo, situation the same. I will try to see if there is enough thread length to mount the Optimus burner on the Optimus tank. David L
