The carb is now rebuilt! I think I found the culprit - the old pump plunger has a leather seal around it, which is no longer properly in place (see pic). The rebuild kit came with a new plunger and seal - will check my mileage. Hoping the replacement part will make a difference.

Hank


http://i1204.photobucket.com/albums/bb405/kgimbal1/carbpart.jpg