While reinstalling the diaphrams today I noticed something odd.
On carb #3, (right front) the brass round piece that the diaphram needle goes into was protruding about 3/8" out of the carb throat wall. On the other three carbs it was flush with the carb throat walls.
Could this be a factor in the poor gas mileage problem and why. See Pics attached.
[ATTACH]71678[/ATTACH]
[ATTACH]71679[/ATTACH]
[ATTACH]71680[/ATTACH]