033-2000-00 BAD BOY Plastic Idler Pulley-MZ Models 42", 48", & 54" decks.  Replaced by 033-7201-00.

Fits the following Bad Boy models:

2010 MZ - 42" & 48" Deck
2011 MZ - 42" & 48" Deck
2012 MZ - 42" & 48" Deck
2013 MZ - 42" Deck, MZ Magnum - 48" & 54"  Deck
2014 MZ - 42in Deck, MZ Magnum - 48" & 54" Deck

SR-4