Tony's photo used... if "green" is secure max "red" is level beggining fuel pipe (+-) ------------------------ is fuel below red line usable?
I suppose a look through the filling opening will show a downward tube inside the fount, so most fuel in there can be used. I must confess I never checked this on my own 111s!
The wick should drop below the red line and suck fuel up thru capillary action. I'd be more worried by overfilling. Also, isn't the stove self-pressurizing? With the heat radiating off the burner causing the fuel in the tank to vaporize -- so now in a gaseous state the vapor is being forced thru the nipple and up the burner for ignition. Not that I have an Eleventy-One, but if I ever do get one, I already have the OEM Optimus parts kit. [I also bought a gallon of kerosene lately. But that's for my Feuerhand lantern.]
@SveaSizzler The Optimus 111 does not have a wick. The fuel tube bends down towards the bottom of the tank. I’ve got one somewhere in the shed, disassembled from the tank. I’ll go hunt it out. Tony
OK. Thanks Tony. I just assumed it was a bigger 8R, with a built-in pump. I should shut up about stoves I don't own. Could you add a wick, or would that impede fuel flow?
They work perfectly well without a wick, and I prefer to use kerosene - so no advantage in a wick. These are one of the best stoves around. Cheers Tony
As long as vaporised fuel arrives in the burner, yes. It doesn't matter much, whether the fuel is vaporised after, or in, or before passing the wick. Of course it will not be possible to start the stove, when the wick is dry. And there will be little power, when only a hot tank helps to vaporise the last fuel. Radler
Just peaking into tank reveals inlet tube dips much lower than red line. I see the pump >> on downward angle <<< so pump tube inside is much lower than pump knob. I see the fuel inlet tube disappears below the pump tube. I vaguely recall this being *demonstrated. It is my impression, the wonderful 111, has an inlet tube very near the bottom and it will burn fuel nearly to the last drop. Sorry I've found no *link nor example to share.
Slightly beaten-up, but this is an Optimus No. 111 internal-to-tank pump tube. It points down to the bottom of the tank: It will go below the ‘red line’ in the diagram @gieorgijewski has posted above. Cheers Tony
yes Tony - i was find it under pump tube... how yours was disasembled? by mistake or with premeditation?
@gieorgijewski It came like that in a big box of Optimus 111s: Optimi 111 (many and unexpected) I also have the tank. Someone must have disassembled it in Antarctica. Cheers Tony
Robert I was more wondering whereabouts the cutaway was situated. I have a great fondness for pressure lamp and stove cutaways. Cheers Tony