Small Engines (Lawn Mowers, etc.): Craftsman riding mower floods after few seconds, briggs stratton, crankcase breather

Question
Briggs & Stratton 19 HP model 42E707 type 2631 E1
The choke mechanism seems to open and close properly. There was gas in the oil. I removed the carb, disassembled it and sooked it in carb cleaner over night. Blew out with compressed air the next day. reassembled using new carb and pump repair kit. New plugs, new filter, replaced oil and it starts right up but floods out. I made sure the choke was off. The filter is dripping with gas and if I let it sit a while it will do the exact same thing.

Answer
If you take the filter cover off and remove the filter and then start the engine do you see where it's coming from.  It may be that your crankcase breather is not operating properly.  This would cause positive pressure in the crankcase and would pump oil up into the filter housing where the primer goes attaches.  Remove the breather it is full of oil wash it out and reinstall using a new gasket.  Then look at your oil filled to and dipstick be sure that the O-ring seals are in good shape.

If it is gas coming up of the carburetor soaking the filter it could be stick back.  All engines do it a little bit.  Check your muffler to be sure that you have good airflow through it.  If plugged it could cause the same thing.  But if just sitting there the carburetor overflows into the filter assembly you have one needle and seat that are not closing properly.  This could be caused by not only a faulty seat but by the hinge pin of the float causing float to hang up.  Or you would have hole in the float but then there would be gasoline inside the float.  If that is the case replaced the float.  I think that somewhere in these suggestions you will find your issue best of luck I hope this information has helped.