Weber 'pump delivery valve' part number 64290.016 to fit the IDF range of carburettors.
It is a very important part, often overlooked when carrying out a service.
It fits through the pump jet & has a ball bearing fitted inside with a sealed lead plug in the top.
Very commonly this lead plug falls out, the ball goes missing & is either left open or another plug put in without the ball!
When you remove the valve & shake it you should hear the ball inside.
If you do not or its sticks, replace the valve.
Better still it should be replaced when servicing or problem flatspots occur.
Weber 40/44/48 IDF Carb Pump Delivery Valve
- Brand: Weber
- Product Code: 6429001600
- Availability: 10
- Ex Tax: £11.83