I have a phenomenon that I cannot explain on my Primus 96. Sometimes the blue flame decreases then a "yellow ball of flame" comes out for 1 second then it returns to normal. What could be the reason of this behavior ?
@presscall I prime for 3 minutes with a windshield the same way than with my second Primus 96 which does not have this behavior.
Does it have the gauze inside the lipstick? I have seen them occasionally burp, just the once, if it keeps doing though it its flow or pre-heating related Alec.
@Rangie yes there is thegauze inside the lipstick. I think the preheating is good. So it could be the flow ?
Try poking something down the fuel pick up tube to make sure it is clear, and give the tank a flush with clean fuel.
Process of elimination...try boiling the screen in citric acid and clean and reroll it making sure its all the way to the top. Spray out the lipstick with carb cleaner and install the lipstick and pump with air to prick it so you can hear air coming out clean. Then after a test and it still does it check the fuel. I had something kind of similar once (not exactly) and I used a bottle with a long tube on it to suck all the fuel out into a glass. Fuel looked fine initially but separated at the very bottom after a few minutes with a few drops of something else...like oil and water kind of separation. I dumped the fuel and replaced it. Suspect that it was water or some of the carb cleaner that I did not get out after cleaning that was causing my weird flames.
@Remus1956 I will clean the mesh again with vinegar. The rewervor was cleaned and I use a new fuel. @hikerduane I will check this point. Is it important that the mesh touches à he top of the lipstick ?
No, not packed to the very top, just up to the top of the side, leave a little space. The heat is transferred from where the "collar" of the burner bell sits on the lipstick, so it needs to sit up as far as possible into this "zone". Alec.
A number of variables as mentioned above. Mesh position not as critical as a cotton wick in other stoves. I have fired up a 96 and realized I had not replaced the mesh in the burner, stove ran fine. I’ve had a 00 behave as above, jet was plugging and/or the fuel pickup. Duane
Mesh looks fine. I've had a few that had a good coat of carbon in the burner, took some strong scrapping to remove. Mesh needs to be pushed all the way in, no need for a gap, the mesh itself has any gap that may be needed. Duane
Thank you. After cleaning the burner and the brass mesh again and then pushing the mesh in a little further, the problem seems to no longer occur .
@Yannick Michel all advice given will cause this problem, i have experienced similar problems caused by condensation in the fuel, i would all so replace the fuel and clean out the tank making sure it is perfectly dry and replace with fresh clean fuel
