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Old 12-20-2003, 12:45 PM
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Next time you park it leave the gas cap loose. If the vent is plugged or it's not a vented cap you could be creating a vacuum in the tank (pumping the fuel out with no way for outside air to enter and equalize the tank pressure) and when you shut it off it's sucking the line/pump/carb empty trying to equalize it's pressure with the outside world.
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