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Thank you I’ll check it out when I get homeCheck your tank vent. As you fill the tank, the air has to escape easily. Make sure there are no bellies (sags, low points) in the vent line between tank and the exterior vent. If there is a low point, fuel from the last fill up will collect. It takes quite a lot of pressure to overcome the weight of the collected fuel. Also check the exterior vent itself for blockage.