Ricardo This is an excellent question. Upon researching the different models this part fits, (I am NOT an employee), I notice that this fits machines going back as far as 1995. It could fit many Briggs, or Hondas or Tecumseh engines. The bulk of self propelled mowers (excluding Suzuki 2 strokes on Lawnboy mowers) have those 3 engines on them.Your best bet is to get the Sears model number off of the mower if you can and go to link removed and see what part number they have listed for the blade adapter and cross reference it to the part number for it here and to some of the mowers in the compatability list that are also listed here. My bet is that it would work.