I am wrestling with a similar problem. So I was looking through my acquired settings charts and noticed that there was different settings for the needles that do not have a spring loaded top. That setting is 15/32. Looks to me that the carb we are taking about in this thread has the spring loaded type.
The very early 1950 Chevrolet replacement YF carbs (787s) used the W-1 fuel valve (25-33s with solid needle) and float 21-117s. THE FLOAT SETTING ON THIS CARB
ONLY WAS 1/2 INCH!
This arrangement was modified AFTER A FEW MONTH, BUT STILL 1950 to a 25-195s (spring loaded) fuel valve and float 21-122s. The FLOAT SETTING WAS CHANGED TO 5/16 INCH!
The 5/16 inch setting was used with the spring loaded fuel valve on all versions of the 756 carb, 787sa and 787sb carbs, all versions of the 788 carb, and all versions of the 789 carb.
All versions of carbs 964, 965, 966, 967, 2100, 2101, and 3211 used the spring loaded fuel valve with the 9/32 inch setting. Carter did NOT offer a solid valve for these carburetors.
It is important to KNOW not only which carburetor, but which version, and then acquire specifications for that specific carburetor.
As a general rule, the generic aftermarket instructions, which come in a FLAPS kit, are quite useful.......................TO PLACE UNDER THE PARAKEET'S CAGE!
Jon
