White smoke and gas coming out of muffler

I have a Kohler courage 23 (cub cadet) motor that will start, but blows thick white smoke and gas out the exhaust pipe?
I removed the feul pump and poured gas directly into the carb intake, it ran and no more white smoke came from exhaust, so I don't think any seals or rings, etc.. are bad. The compression is good, i can put my hand over the intake and it sucks my hand in very well. This pump is controled by the engine compression via a diaphram below pump creating suction. Not water cooled. It does pump the gas hence the ehaust spew and white smoke.
Could the pump be bad, ie: possibly spilling the gass into the diaphram area (cylinder head)? Has anyone had to deal with this too?
Thanks in advance to anyone who can help me.

 

Not sure just some gas in the intake is enough to determine much, unless you were to gravity feed fuel so it could run a while.

Check the oil level?
Check the pulse line to the fuel pump, and the breather line to the air cleaner for oil?

 

Sounds like the carb inlet needle is leaking, letting the carb flood. Check for gas in the oil too (smell it). Don't run it if there is gas in the oil.