****Please see message #7 (titled "the plot thickens") for updated smoking issue description****

I have read up on a lot of smoking issues on this forum but felt this one is quite unique. The smoke is a whitish smoke combined with some black making for a gray. I know that blue/white = oil, white = water, and black = gas. Here is the sequence of events that led to the smoking:

--> Drove the car for 1 hour (no sign of smoke)
--> Stopped the car and pumped the priming pump a few times, gas leaked out of the priming pump and the pumping felt firm like there was fluid being pushed. I did this to test the pumping mechanism for the first time, mostly out of curiousity.
--> Started the car again and now a significant amount of white/black smoke is coming out of the tailpipe (especially during loading).
--> I drove the car around for 5 minutes and the smoking is still very significant.

Can someone please provide some insight here? It doesn't make sense to me that the car should smoke so badly after it has been a few minutes. Is this normal? Please let me know.

Thanks,
Billy