Primus Omnilite Problem

[suffolk duke]

Hi, i am using a primus omnilite TI stove on a trip in south america. As travelling on a bike i am using it with petrol. It started working fine with a lovely blue flame after pre heating but now it won't work properly. All i get is a yellow flame.

I am using the correct jet, have cleaned it many times and also experimented with pre heating times. The wad in the bottom is damaged but still ok to pre heat. I then open the valve a bit to continue heating until hot enough for blue flame.

Any ideas on what might be the problem?

Thanks Phil

[Xander]

I had a very similar problem with primus stove. It work amazing for a couple of weeks then basically i had to strip it to the bones every week. then every day.

I think the jets are just no good, after replacing the jet ( to the wrong one) i had the above repeated but we are talking first few days it worked then i had to strip it. Rinse and repeat.

I assume you do have the correct jet in. Mine came with several (lPG/ Petrol? and i cant remember what else)

Basically i think they are only really rated for Ultra-pure fuels like shellite, white gas, ,,,,,(nnot kero) Maybe try running on ultra high octane fuels (98 and the like) or even ethanol?

sorry cant be more help i never did sort it out, I ended tossing it and going back to my clunky industrial but never failing MSR whisperlite...

[suffolk duke]

Thanks for your reply, although not good news. Will try a full strip down and maybe 98 octane fuel. Other fuel is a hassle though. We are travelling on a 2001 Africa Twin, at least they are reliable!

[Petrus]

We use the old Omnifuel wich I think is the same as yours. We clean the jet by: pump up the pressure, inserting the pinch tool and at the same time open the valve a few times until you get a firm spray.
If this doesn't help any more it helps to clean the valve (the needle valve). Take out the valve and remove the hard build-up especialy in the axial groove. After this it should by like new again.
Good luck!


www.amsterdamtoanywhere.nl

[Xander]

Hey in an other thread TT suggest a cap full of F1 injector/carby cleaner with his stove.. Worth ago I guess.... makes sense really ....dirty jets use a jet cleaner..

Originally Posted by *Touring Ted*

I've got a Coleman Dual Fuel...

I only ever use Petrol and it works great (I put a cap of FI cleaner in the mix every 50 uses to keep the jets clean).

I've used Coleman fuel in it which is expensive. The only benefit I got was that it burnt without an odour.


Stick to burning petrol and as long as you're not in the Antarctic, you should be able to source it..

Caveat: try at own risk I have no idea what this can do to your stove.

[*Touring Ted*]

It burns a lot hotter and helps to shift the soot that builds up in the generator pipe.

My Coleman eventually gave up after ten years of serious abuse. It was leaking from a few places and it was easier to just buy a new one and keep the old one for spares.

Another trick with a blocked generator pipe is to remove it, lightly clamp it upright in a vice etc and get it glowing red hot in a plumbers blowtorch (MAP gas). The soot vaporises and whisps out.

[suffolk duke]

Thanks for all the advice. I have cleaned the jet again, the valve, and greased the pump and will try again when i next camp. Hopefully it will be ok as have many months of travelling left!