Rebuilt Street Averager starting problem

[jedrattle]

I had a friend rebuild my Street Averager 670cfm. We put it on the 360 and filled the float bowls through the vents. It fired right up with no issues. We shut it down and fired it up several times. Worked great!
It sat overnight and would not start. I poured gas in and got it fired up that way. Once it ran for a min or two, it would shut down and start right back up with no problems. Fuel pump, timing, and float levels are good. I am stumped. What would cause this problem?

 

[Murray]

Sounds like carb is draining when shut off for a period of time. It could be flooding into the engine, or more likely , needle and seat are not holding and draining back to fuel pump.

 

[Dicer]

needle and seat are not holding and draining back to fuel pump.

This is not possible, being the needle and seat are above the float.....here is a link to a forum, a guy was having pretty much your issue, come to find out the gaskets in his kit were not correctly made...…

Holley Carburetor Leaks Fuel out of Primary Bowl into PV cavity - Hot Rod Forum : Hotrodders Bulletin Board

 

[jedrattle]

Thanks for the response. We tore it apart to discover the pump spring was bound up and not letting it squirt fuel.