Hi, I purchased what I thought was an exact carb (4GC H3) replacement for my 1953 Olds but there are a couple differences. 1) There are two different size (and shape) floats on the replacement carb. 2) Doesn't seem to have any check balls in it. Now, I was reading that some of the 4GC's didn't have check balls...which would be ok...except for one other thing...the accelerator pump boot was installed upside down! Could this carburetor have worked with different sized and shaped floats, no check balls and an upside down accelerator boot??? TIA Numberz
The floats, maybe. Check balls, maybe. Accelerator pump in upside down, not gonna work. Sounds like whoever rebuilt it rebuilt it to sell, not use.
Not the accelerator pump...the accelerator pump boot. This is a "barn fresh" carb...that I took apart last night. No one fooled with it. After just watching a video from Mikes's carbs, I see that the carb he rebuilds has the same flats as mine. So, it must be an ok thing to have two different shaped floats.
The 1953 Oldsmobile primary and secondary floats ARE IDENTICAL! The original floats were a double brass pontoon connected with a brass arm. Some of the later replacement floats were identical in shape; but had the double brass pontoons connected with a steel arm. If the arm material is different; that would be OK. The first Oldsmobile carburetor to use different floats for primary and secondary was 1958. Jon.
I have 2 1953 Rochester 4gc's and one has the moon floats and one has one round and one moon...as in this video link below. Check it out at about 7:16 http://www.youtube.com/watch?v=tXePL0_DJrU&feature=related
The Jalopy Journal
