When starting my bus ('66) after it has been sitting for a while, it
occasionally takes several engine turns to start (like about 5 or 7).

When I drive, gas up, continue driving, it will start on the first engine
turn.

A friend indicated that it could be that the carb is leaking gas, and a few
engine revolutions are required to purge the flooded engine after it has sat
for a while.  

Does this sound likely?  Any other ideas?

Thanks,
...Markus

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'66 "rough looker, hackjob skylit, soon to be sunroofed"
			 Westy aka "The Tardis"  
                        (british racing green/white)
'74  Thing              (pumpkin orange) 
'78  Bug 'vert          (black, white top)