The Optimus Nova+ is a multifuel stove. This means that you can use a number of different liquid
fuels, such as gasoline, diesel and kerosene. Unlike propane gas, these are often easy to get hold of
even in the most remote corners of the globe. They also make your stove considerably more powerful
when used during winter trips.
Preparing food on a multifuel stove using liquid fuel is slightly more complicated than using a gas
stove. First off, the fuel has to be pressurized in order to make the stove as hot as possible. The gas
in a gas bottle is already pressurized when you buy it from the shop, but the liquid fuel you put in your
fuel bottle is not. Therefore, you have to pump up the pressure in the bottle yourself.
You also need to preheat the stove for a short time using a squirt of fuel. Preheating involves heating
up the burner to such an extent that the fuel is vaporized when it passes through the burner’s nozzle.
Vaporized fuel burns effi ciently with a blue fl ame and a hissing sound.
When your food is cooked and you want to shut off the stove, you turn the entire fuel bottle to OFF
position. This places the pump in a position whereby air comes out of the bottle instead of fuel. When
the fuel remaining in the hose has burned, the fl ame goes out on its own and the pressure remaining
in the bottle seeps out.
If you turn off the stove using the control valve only, fuel will remain in the hose and the bottle will stay
pressurized. This will cause a fuel spill when you dismantle the stove or transport it in your pack.
The following pages show you how to use the stove, step-by-step.
EN - HOW YOUR STOVE WORKS
1
Fill the bottle with fuel and
screw on the pump.
WARNING! Make sure that you stay well away from a lit stove or naked
fl ame when you are fi lling the bottle with fuel. Use only Optimus fuel
bottles.
Do not fi ll the fuel bottle to the brim. It should only be fi lled about ¾ full. You have
to leave some space for the pump and the air that will be compressed when you
pump up the pressure. To ensure proper usage of the “On / Off “ function by tur-
ning the bottle, check the fuel intake hose is bent away from the pump cylinder.
The brass fuel fi lter holder should touch the interior wall of the fuel bottle. Check
that the seal is positioned correctly in its groove before you turn the pump into
position. The seal must be fl at and even all round. Screw on the pump properly
and wipe off any spilled fuel.
Read more about various fuels in the chapter on fuels.
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