RE: Jiffy Pro 4 propane
i have seen them in use. no fumes at all. great for drilling holes inside permanent fish house. usually start on one pull every time...but then again, gas ones do too if you take care of them. only thing i don't like for sure about propane is 1) cost of the 1# tanks. 2) if it is really cold, those little propane tanks are not too efficient when they start to get low...like they freeze.