Re: Zanussi FL881 belt.
bit of a long shot but have had wrong numbers printed on belts before
looked through workshop manual quickly not a lot of info on this system but works the same as the ariston autos used to with variator pulley. some of these belts seemed bigger when put on due to wear in the width but nowhere near 3 inches i would look at wrong belt
have you got a v belt supplier in your area we have one called fpt used to be called fenner belts
http://www.fptgroup.com/
find local branch and take old belt to them see what they can do
hope this helps
Dave