The Stovebolt Site Forums The Shop Area Engine Shop Sporadic stall & won’t restart in hot weather

My ‘49 3600 (216) typically runs well, however, once or twice a year when driving in temperatures above 90° it will unexplainably shudder, and then stall at a red light. It will not restart until it sits with the hood open for about an hour. I do not believe the truck is overheating, I can let it sit and idle in the driveway for 20 minutes on a sunny 92° day, and the gauge never gets above approximately 190. I do notice on the times that it stalls and won’t restart there is fuel leaking from the carburetor at the throttle linkage. Both sides of the carburetor at the throttle linkage linkage are leaking fuel. It happened today, temperature outside was 91° but, again, temperature gage was just slightly above 180°. My Shadetree mechanic brain is out of possible causes. Any ideas? Thanks so much, I love this site and all of your help.