Outdoor Retailer: Primus Liquid Fuel Pump

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When shut off, many liquid fuel stoves retain a little fuel in the hose that connects the fuel bottle to the burner assembly. Sometimes, this leads to fouling of the hose, and the deposits of impurities could interrupt the flow of fuel. More often, it simply oozes a little fuel when disassembled. ...

Full article at http://www.trailspace.com/blog/2011/01/22/outdoor-retailer-primus-pump.html

Leave it to Primus. Great design. Anyone know if I can retrofit my my isobutane version of this stove with the liquid fuel components for cold winter backcountry trips? I'd like to not have two of the same stoves. They look the same (the stove part), but I don't recall if there are differences in the internals?

My Optimus Nova has this feature, and I bought it years ago. I'm not knocking it at all, I just thought it was pertinent that it isn't a new idea.

XterroBrando, here's Scott Kaier's answer to your question regarding retrofitting:

It's doubtful you'd be able to retro fit this pump to work with a canister gas stove.  With different burners and fuel jets designed to work with specific types of fuels, I'm guessing it would be a difficult switch.  And since you're working with flammable gasses, trying to do so could be dangerous.

Gonzan, thanks for pointing that out. You're right that it's not exclusive or new technology, but I hope it's an interesting point about stove design for some readers to learn about and discuss.

We always solved the problem of residual gas in the fuel line by simply breaking the seal between the the fuel tank and pump, raising the burner above the fuel tank, open the stove fuel valve, then let gravity empty the contents of the fuel line back into the fuel tank.  This works with every liquid fueled stove I have ever used. 

Ed

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