Heh. It's funny that you and I have an identical barge.
As talked about before.
If you had the same rims on your car as mine, you wouldn't know the difference.
Anyway, back to the gas. When you start, the gas goes down the line at fast speed and into the converter (some turkeys call them regulators, suit yourself
) and then it's all go. As far as I know, there is no priming involved. If I don't start my car for say a few hours, it takes a few seconds of cranking compared to starting it up after maybe half an hour after stopping. It would surely be due to evaporation and other crap. As the gas is liquid along the way until it hits the converter, it must dissipate some what. The converter I have like most out there has a priming button. If you have a damn hard time starting, pressing on the priming button when cranking can get it going but it's damn hard. It's stiff as a rock. Oh, and if you press the priming button when the barge is running, it will conk because it is flodding it. It's sort of like trying to act as the gas mixer by changing the flow of gas yourself.
It is a good idea to run petrol every now and then. For me it means rocket power, but it also means the engine suddenly likes to drink all the petrol too. Petrol doesn't go too far with my barge.