Hello,

I've just get an old Primus N° 71 complete.

I don't know the liquid to fill in (unleaded or kerozen?)

Who can help me?

Thanks.

Hello,
You can you burn unleaded gas or Coleman Fuel (white gas).

Chuck

Hello Chuck,

1- how to start the primus? There is no pump.

2-What's happen, if I use kerozen? Is there a risk of Explosion?

3- Can I use it in a house, or is it needed to use it outdoor?

Hello,
Fill with white gas or unleaded gasoline (petrol). Close the lid. Take a small amount of denatured alcohol or meths and place it in the small indentation around the stem. Light and allow it to burn to warm the tank and get the stove to operating temperature. Or you can hold the tank in you hands for a bit and warm the fuel. Open the valve and allow some fuel to come out and collect around the base of the stem. After the flames go out. Open the valve and light the vapor.

Do not use kerosene it will clogg the wick. You can use it inside or out. Just keep proper ventilaton.

Chuck

Unleaded or "white" gasoline only. Kerosene won't present a danger (quite the opposite); it just won't work.
If it was a kero stove, it would need a pump. But petrol is far more volatile, and the stove self-pressurizes. To ignite, you close the shutoff valve with the key, and put alcohol or petrol in the depression at the base of the burner stem. Light that; as it has about burned out, open the valve and light. The preheat vaporizes the petrol, and the heat of operation keeps it going.

...think alike, and at the same time!
As Chuck says, these can be used inside or out, but I'd keep it outside myself. They can overheat, whereupon the safety valve gives way and a blowtorch ensues.
These self-pressurizing classics, including the Svea 123, were fondly known as "Swedish hand grenades" by Northwest climbers in the early days.

The stoves that use white gas present more risks than those that use kerosene, because of the volatile nature of the fuel.

With gasoline, it takes only one mistake or one negligence or one moment of inattention to create often irreversible consequences--and with gasoline, there is almost always no time to respond to counter the mishap.

It happened to me once in the garage--I turned around only for a minute or less. It never occured to me that the stove would create problems, because it was putting up a nice, blue flame. Lucky for me, it was kerosene that I was burning. Only the small table got scorched.

The damage to the house involves not just the loss of the house itself, but also having to live in a temporary shelter for months, haggling with the insurance company, dealing with the contractors, etc. The price required to pay in terms of human pain is intolerably high.

All these assumes that no body got hurt.

I agree. In my opinion, petrol stoves are quite safe when handled properly, with one big caveat- outdoors. I've camped with Coleman suitcases since I was a kid, with no problems whatsoever.
And I've used the Coleman indoors, but very rarely: during a couple of power outages and while our kitchen was being remodeled 20 years ago.
As much as anything, it's a matter of percentages. One camps or hikes generally only a few days per year. Even the fanatic is still doing it from time to time, not everyday. Regular domestic use of a stove (or pressure lantern) involves daily use, perhaps several times a day. Under those circumstances, the chances of a serious problem with petrol rise expotentially.
The Continentals and Brits used pressure stoves and lanterns extensively domestically. They were invariably kerosene, with good reason. In the US, the use of pressure stoves and lights was largely recreational. So gasoline wasn't so problematical.