Are we sure that the boost pump was on at take off, or did he or the other
pilot hit that when the engine sputtered at the point of stall?  As my
husband pointed out, we had the similar problem with the fuel flow well
beyond the fuel stop because of a failure of an aneroid bellows getting
stuck (I am not a pilot, but this is what I recall him telling me).  Our
plane was at 47.5 gallons per hour and he said the plane was shaking
horribly when he throttled back.  He also was at 100 foot above the ground
and I was watching the take off.  The black smoke did NOT appear until he
was off the ground around 50-100 feet.  Does the breakdown of the avionics
indicate when the switch was turned on?  Again, I am just the wife, just
asking to learn the issues, as this situation occurred twice to my husband
in one day while trying to figure out the cause of the smoke and shaking.  Susan Brunner