Hello. My optimis 111 stove which I've always run on Paraffin has what I think is the burner for the Mulitifuel model although the lid says for Benzene. Can anyone confirm this ( pic here)> Its not the clearest of images but i hope you can see enough to get the right impression. If thats right what exactly does Mulitfuel mean ? Apart from Paraffin can it burn Petrol, Diesel, Methylated spirit,White Spirit etc etc?? If it can does the little brass jet have to be changed accordingly? I'm sure someone in here will know, so I'll say Thanks in advance. Your help is as always appreciated. Jack.
Jack, the lid says "Kerosene" which is another name for paraffin. It's NOT a multifuel. You do have a flame ring for it, don't you?
Yes I do have the top ring for it. Can you tell me what the difference is between this one I have and the multifuel model assuming there is a multifuel model?? Also while Im at it can you help with this too................... My Trangia stove instructions, say to dilute the spirit with 10% water. Why is this do you know? I can only assume its to do with preventing the flame from making ''soot''> If its right how does doing that effect the heating properies of the spirit? Ive always used it neat in the past. Thanks , Jack
Morning ,@Jack Ryan , The Multifuel 111 is the 111T, for the most part. Check the Stove Reference Gallery to learn more about that great stove. It's a silent model, and not a roarer, as your current kerosene 111 is. Cheers, and God Bless! Every Good Wish, Doc PS - check here for more info, and some good photos: Optimus 111 Hiker
Yes according to Trangia, diluting the meths by 10% with water lessens the amount of soot. I have heard it lessens the heat output a little bit but they I'm not certain of that.
I dilute my "meths" w water, in all my alcohol stufff, a carefully measured (not) little pour. It helps preventing soot, and slows the burn down.... ..the stoves can kind of "boil over" and really start to run away with themselves, the water helps prevent this.
@Jack Ryan As Doc Mark has said, the multifuel burner is a silent. The roarer burner like you have (and I have) is for kerosene/paraffin. There is a roarer with 2 legs (vs the 4 on ours) which is for petrol/gasoline/Coleman fuel/panelwipe and branded 111b. Back in the 1950s the 4-leg (branded 111) was advertised for both heavier (paraffin) and lighter (panel wipe) hydrocarbons, but Optimus got out of that quite quickly. There are a number of potential safety issues, and particularly in an older stove it isn't worth risking even to test. On your second question, there is some actual research, summarised here: Efficiency of Methylated Spirits/Water mixtures In short, adding water slows evaporation of the alcohol, preventing overfuelling. What it doesn't do is prevent the alcohol doing what it would have done with heating your food. Of course, it does slow the delivery of the heat. @Majicwrench describes it well.
I agree. This 111 kerosene model ... It can be run on gas, panel wipe, but .... I do not recommend it. But, the reason why is the same reasons I do not use the 111B that is designed for the lighter, more volatile fuel. With the lighter fuel it is more important to have a good fuel cap gasket, SRV, and NRV, if equipped. Use care.
