I just bought this 8n a couple of months ago and was using it for disking. When it stated to sputter, I went for gas. Shut the tractor off and opened the door then took off gas cap. When I took the cap off gas shot out and vented over 4 feet in the air. the pressure was enough I could not get the cap back on. It vented like this for 10 -15 seconds, reminded me of taking off a radiator cap. Literally this thing was a geiser under pressure. If it was just a gas cap vent plugged it would of just hissed and been done. The only thing I can think of is the crankcase vent is plugged and it backed all the way through the carb and then fuel lines. Has anyone ever seen anything like this? Been on equipment for over 40 yrs and have not.