Can Exmark elaborate on the problems associated with the Kohler Command Pro 20 and the new high capacity air filter? Am I to understand that the carburetor needs to be changed to match the newer air filter? What are the symptoms of the wrong carburetor in regards to the new air filter? BTW I have a Toro 2002 Z150 that I bought early this season with the Command Pro 20. The mower continually likes to die out on hills or fast moves.