Multifuel X2 not getting fuel consistently Hi, I bought a Trangia Multifuel X2 a few days ago, but I'm having some problems getting it to work. I initially tried it with regular gasoline (I know it isn't recommended, but I have done it with similar burners for many years), but when turning on the valve I got a nice stream of fuel for about a second. Then it suddenly stopped. I initially thought I had overfilled the bottle or that the pressure was too low, so I emptied it a bit and pumped more. But the issue persisted. I then tried another pump, but still the same issue. I have confirmed that both pumps work on another (Primus) burner. I have even tried using gas on the Multifuel burner, but it seems like the fuel lead is completely blocked somewhere. As a test, I tried unscrewing the fuel lead just before the 90° bend and blowing in the opening, thinking that air would come out through the jet (or where the jet would be. I tried without it as well). Is there a valve or something somewhere else in the lead that has to be opened? The Primus Omnifuel has a second handle closer to the burner, which the Trangia doesn't have. There is something there though, but perhaps that shouldn't be touched? Any ideas what the issue might be? Thank you!
Used. New. Check a filter, likely plugged somewhere, only allowing some fuel thru briefly between opening and closing. Duane
It's a new burner. I think it's strange that a filter would clog so quickly, but it is of course not impossible. Do you know where there are filters/how I can access them?
Might be manufacturing or other debris in the fuel line or under the jet. You can flush the whole thing by removing the spreader plate and jet, turn the stove upside down and flush some fuel through the system into a container. MSR has a video online of doing someting similar to a Dragon fly after servicing.
Just tried your suggestion, but without any luck. But then I tried to unscrew a nut (circled in the attached image). After doing that it seems like something opened up and it started working. But what I find odd is that it still works after tightening the nut again. So, does anyone know what I might have done and what the nut does? Note that I never unscrewed the nut completely, only until it touches the black thing (whatever that is. Kind of hard to see in the picture).
Isn’t that where the second valve is? Unscrewing the jam nut maybe allowed the needle to back out. ? Where the fuel line enters that area, may be a filter there. Duane
Might be. The old model and the Primus Omnifuel both have valves there, so this model is probably somewhat similar. I couldn't find anything about the nut or needle in the service manual, but I have contacted Trangia support to ask about it. Will report back when I get an answer.
You must have bought this either barely used or out of a close out shop with it being incomplete. Duane
@Hannes Since I don't have the illustrated parts breakdown / exploded view for the stove in question lets just call it a metering rod for the sake of the discussion. It is similar to the valve on the Omni-Fuel just shorter and non-adjustable. When I had the multifuel there was a c-clip on the end that could be removed, then the nut and metering rod could be removed for cleaning/flushing out the system. At one time Primus put a filter on the fuel inlet fitting, but it's missing on newer stoves. Mike.
That sounds reasonable. I'm going out for a week today, so I will open it up when I get back. (Don't worry, I have a back up stove)
Primus use the same body for the X2 as the previous Omnifuel so have to put something in place where the control spindle is fitted. As suggested it is a tapered end to meter the flow at a steady rate as determined by the valve at the bottle. You may have had some manufacturing debris or grease in the tiny space and loosening the nut shifted it? You can remove the circlip, undo the nut and carefully pull out the spindle, wipe it and replace. Take care replacing as there is a blue Viton 'o' ring seal on there and it is easy to nick it on the stove body. I do have replacements if needed at any time..
Lets call it the fuel path. I can't remember if it screws in/out or not and just the tip is missing. I have not messed with one of those in a long time. The burner is not the same as an Omni Fuel. It's a completely different design.
Thank you for all your answers. I have removed and cleaned the spindle. Although I couldn't see any debris it does work better now. The flame is a bit uneven (sounds like a pulse jet engine), but I think I just overfilled the bottle which made the pressure too low. I also got an answer from Trangia which was basically "I don't know, ask Primus".
