Coleman dual burner 425F

I have a 425F that leaks fuel at the rear nut between the control knob and the valve.
I tighten it and the leak stopped temporarily.
I took is apart and cleaned the shaft with steel wool.
I installed a piece of Teflon packing cord so that the ends touch.
Put it back together and the leak is gone and the stove burns properly.

Is the Teflon cord fuel proof?

I also notice the newer stoves are dual fuel. Can I convert this unit to Dual fuel?

Thanks

 

Graphite packing’s chosen for a reason: it’s fuel-proof; heat-proof and compressible. Teflon is likely to degrade sooner or later due to the combination of those factors.

Dual Fuel is a marketing ploy, the two fuels being Coleman and pump gasoline but the latter gums up generators and the current product is no more resistant to that than older, non-dual fuel generators.

 

In an emergency, results as @presscall, mentioned.
Duane

 

I have a 425F but I think the tank is newer. The fuel cap is in the center not on the end. Does anyone know if this valve uses the large or small packing or if you can make it seal by using graphite cord to replace the packing? I have the same problem as the OP.

 

You may use any graphite cord which will fit around the control stem however I strongly suggest you find some which is smaller then the opening thus allowing you to insert several wrappings which will compress and hold the stem centered.

 

I have not found graphite packing to "go bad". I might add some on rare occasions, but usually I have packed it back in, tighten it, and all was good.

 

Would Teflon tape work just out of curiosity? I’ve seen a graphite tape mentioned in other forums but haven’t seen that product anywhere. I have some 3/32” graphite cord I will try adding a coil of that. Thanks

 

Try a couple wraps of the graphite cord. Even better, go to Old Coleman Parts and order the proper graphite packing for your stove.

 

There's a yellow Teflon that's fuel rated, but I don't know whether it's really different or it's a color coding since it's normally used for gas plumbing(not the liquid kind). It may work, but that's not its intended use so you need to ask yourself if you really want to trust it. In the US, OldColemanParts sells a graphite ribbon that you can cut off what you need to wrap around the shaft to build the thickness up. Other than that, I'd check a plumbing supply house or your local homeowner store's plumbing section for something like that graphite ribbon.