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Pressure in gas tank

Posted: Fri Jan 12, 2018 8:35 am
by Barrie2777
When i first tried to start my 400 this fall it didnt want to start. I removed the gas line from the carb to blow the needle off the seat. Gas came pouring out and wouldnt stop. When i released the gas cap i could hear a release of pressure. This was pressure built up during the summer. This alone is not unusual as all sealed gas cans do this however this tank has what should be a vented cap made by STANT. I also have to run this machine with the cap loose otherwise a vacuum is created and the carb can no longer draw gas.