cold starting fuel problem

Just to follow up some of the same thoughts, it's pretty normal for the fuel in the carb to dry out after several days. The situation is made worse if there is any every-so-small leak in a fuel line that can let air in. In these cases, the engine will need to crank a bit to get even a good mechanical fuel pump to get fuel where it is needed. I know that's what mine does.

I find that garaged over night, I do not have this problem.

I know of folks that take of or bypass the mechanical fuel pump and run an electric pump. It can make noise, not authentic, etc. but it pumps fuel as soon as the key is turned on. Some folks that start their engines only after significant "time in the barn" find the quicker start with the electric pump worth making the change.

For the original poster (and I'm not the carb expert here), you probably need a carb rebuild to start with. I while back, I did not want to do my AFB myself and sent it to Hobbs up in New Hampshire with excellent results.

Good luck,
Bruce Clarkson

Yep, or in addition an over active heat stove / crossover.

Edited by Boris Badanov - Apr/22/2014 at 2:28pm

Mr. Ed wrote: If your carb does not have the insulation plate under it, it will get hot after you shut the car down and this will help in boiling out the gas that is in the bowls. It is the only explanation that you have the same problem after changing carbs. Later! Mr. Ed

I have a .32 insulator gasket installed on an Offy 360 DP.  The car starts hot, warm, and cool with the first crank after it's been recently driven.  When it sits for a period of days, it takes time to get gas to the carb.  The longer it sits, the longer it takes to "prime" the carb.  It's not boiling out from heat, and there's no leaks in the fuel line however minimal because you'd smell it in the garage. 

It's little more than a very mild nuisance which I'm not particularly concerned about, but I'd love to find out what it is and fix it because, well, because I love to tinker with the car.