Weber 'pump delivery valve' part number 64290.014 to fit the 40 & 42 DCNF 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 dont or its sticks, replace the valve.
Better still it should be replaced when servicing or problem flat spots occur.
Weber 40/42 DCNF Carb Pump Delivery Valve
- Brand: Weber
- Product Code: 6429001400
- Availability: 10
- Ex Tax: £10.98