RE: Which 13.5mm carb for Poulan 42cc???
Ha! That´s interesting. It is a mistake on their website. If you type in WT-540, it says to use WT-660. If you type in WT-660, you are right, that comes up as a 7.94mm carb.
Good catch on that.
The WT-610 is the number I should have posted along with the WT-540.
AV8TOR