Both may be right. The fuel lines are sized for liquid propane and may run the engine lean from fuel starvation when on vapor only. My pickup truck with IMPCO brand dual fuel conversion starts better on liquid than on vapor. The fuel tank does not even have a vapor tap, but when I run the tank below 5%, the fuel dip tube can no longer reach the bit of liquid propane in the bottom of the tank and must run on vapor. Under those condition, a cold start involves a lot of cranking, a few lean spits through the carb, and will stall 2-3 times before it finally idles on vapor. The only downside to starting on liquid in cold weather is that you need to allow the engine to idle a bit to heat the coolant to keep the vaporizer working at making propane vapor from liquid propane.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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