Poast #8:
"That cover is common to many Walbros found on 024/026 saws: WT-11, WT-426, WT-427, WT-590, WT-195, WT-155, WT-403A. Same number on Stihl IPL 024/026
Should be easy to find a used cover."
Yes it is common. I looked it up for the WT-22 that it will fit for sure. I did not check where else this cover is used too. But yes it is used on different WT carburetors.