>>667908yeah man propane has the nice blue flame because they mix like 30% oxygen with it to sell more fuel for a lower price and have a cleaner burn with less soot. Air has 21% oxygen...
You can also use a propane pressure regulator. Like
>>667913, use a garden hose, hook it up to your facemask and off you go!
Don't forget to use teflon tape on the threads. And don't worry about the propane, the molecules are too big to pass the lung membrane, you breathe out the propane and the body takes up the O2 in the mix.
Just don't smoke in the boat or on the dock.