I had it happen with a flooding carb. The solenoid was suck so it kept dumping gas and I ended up with about 1/2 gallon of gas in the oil. I would get the problem fixed soon as you never know when the conditions will be right for explosion of the gas. Probably won't explode the vehicle but cna do aweful things inside. Mine was extreme, I think, but luckily got it fixed quick and drove it little.
must be some kind of terrorist who likes driving bombs around. just kiddin yeh it happens either way but either way ya look art it gas in the crank will do all kinda nasty stuff, oil breaks down bearings give out s*** like that.
With that much gas disappearing in 15 min...i would lean to the fuel pump dumping the fuel ...you would see big nasty black stinky clouds coming out of the exhaust pipe...if you could keep it running...that is if the carb was dumping all that in the crankcase via the cylinders.
I use a $40 Napa ~4 psi (IIRC) generic. Mounted to a bolt on the PS of cylinder block, grounded to a valve cover vent and gets power from that little terminal deal on the bracket from the ignition coil. Never had a problem, the seal on my old mechanical wasn't bad, the pump was just dead so I left it there for now, might eventually go back to mechanical for purist and K.I.S.S. reasons.