quote:Right after you shut off a hot engine the temperature actually rises under the carb and tends to boil the fuel out of the carb.
Sure, that could be the cause. But...
I have no spacer for my carb and have never had any gas vapor smell problems. Car is parked, usually with rear deck still closed, in a garage, and I've never come back out to the smell of gasoline.
If I started smelling fumes, I wouldn't go out and buy a spacer, but instead I'd start looking for something leaking from somewhere.
Larry