In rebuilding my KA carbs this season I have noticed that one of the flappers in the upper fuel pump diaphragm is becoming deformed. Most recently I had difficultly starting and found this.
AS you can see the one flapper is deformed to the point where it is likely not sealing off the hole it is intended to cover. What I don’t know is why or what effect if any thins has. Anyone else have this issue? Solutions?