Quote:

Thanks for the plunger/oil explanation. That makes sense to me.

I took the carb off the car a couple of months ago & the pump plunger walls were pretty smooth (polished them a little anyway with some 800 grit wetordry). I removed the squirter nozzles & the passage from the plunger chamber & seems clear & the check valve is also functioning properly.

I picked the carb up at a swap meet a few years ago and rebuilt it about 2-yrs ago. Since the plunger was left sitting dry in the carb for a couple of years before it was used, could that have caused the problem?



800 grit seems too course to me, I would be concerned using the finest Scotchbrite pad.