Packard Forum Index » Pre-War (1899-1942)

I have disassembled two EE23 carbs and found two different springs on the lower portion of the pump piston and two different springs on the upper portion.

Unfortunately, Stromberg did not publish specifications for the springs....at least in the documentation I have.

What I would like to know is how does the stiffness of the upper spring affect performance and how does the stiffness of the lower spring affect performance?

Attach file:

---

  springs.jpg (154.84 KB)


  carb springs.jpg (271.33 KB)


  carb upper spring.jpg (181.06 KB)

Sometimes those accelerator pumps stick in the bore. The workaround is to use a stronger spring. The external spring holds the dust cover. Too strong an internal spring can inhibit throttle return. The spring on the actuating lever demonstrates full application of the pump prior to full throttle and opening of the power valve when equipped. If the pump is sticking the lever spring will expand prior to application of the pump.

However, hesitation problems often are assumed to be problems with the pump when in reality the main jet aerator passages are clogged. This requires use of a special jet wrench which should be handled by an experienced rebuilder.

Thanks, Tim, for the explanation.

Bob