ORIGINAL: w8ye
You can stretch the springs or cut coils from them.
It is best to have some extras from old carbs laying around.
Walbro sells a kit with different springs in it. I'll look around and see if I can find it again.
Edit: OK found it. If you look on page 7 or 8 of the Walbro service manual you will see a picture of the spring kit I am referring to. It is listed in the manual as Walbro part number 400-606. It contains quite a range of springs.
Link to the service manual -
http://wem.walbro.com/distributors/s...viceManual.pdf -