"After reading several threads
"After reading several threads about carb problems I thought I would give a little insight from what I have found. The Q-jet carb and to a lesser extent webers all have passages drilled in them to facilitate fuel flow. These passages are then filled with a plug at the factory. After some use theses plugs will leak. On a Q-jet it leaks into the manifold so is not evident. When the carb gets to a point that it will not start without several seconds of cranking it is (NORMALLY) these plugs leaking all the fuel out overnight. They can be repaired, however it requires rebuilding the carb or at least removing the throttle plate to access these plugs. Put a small amount of JB weld or marine tex on them and allow to cure overnight. re-assemble the carb and it should solve this problem. Quite a few carb shops I've seen and aftermarket rebuilt carbs (Sierra) address the problem haphazardly if at all. you can see the 2 plugs for the primary wells with carb assembled. If they do not have this fix you may want to adress it."
"After reading several threads about carb problems I thought I would give a little insight from what I have found. The Q-jet carb and to a lesser extent webers all have passages drilled in them to facilitate fuel flow. These passages are then filled with a plug at the factory. After some use theses plugs will leak. On a Q-jet it leaks into the manifold so is not evident. When the carb gets to a point that it will not start without several seconds of cranking it is (NORMALLY) these plugs leaking all the fuel out overnight. They can be repaired, however it requires rebuilding the carb or at least removing the throttle plate to access these plugs. Put a small amount of JB weld or marine tex on them and allow to cure overnight. re-assemble the carb and it should solve this problem. Quite a few carb shops I've seen and aftermarket rebuilt carbs (Sierra) address the problem haphazardly if at all. you can see the 2 plugs for the primary wells with carb assembled. If they do not have this fix you may want to adress it."