Keep it on reserve. The ON switch needs a few liters of petrol for it to flow. All it needs is a jump start. The fact it was running then died. It should only be that. Unless there is no fuel filter/strainer, then it would clog the carb. Because when at ON, the fuel passes through the higher intake hose in the tank. The reserve passes throught the bottom part of the hose or fuel cock. Definitely not something to panic on. Just a bummer getting it to fire again, might take you the whole street block.
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ride it like a horse