Lower half diagram
Part #400162
Replaced by #65139
Part #STD541431
The manufacturer no longer makes this part, and there's no substitute part
Part #20613
Replaced by #420613MA
Part #STD533107
Replaced by #STD533107
Mower housing diagram
Part #20551
Replaced by #492574MA
Part #STD541437
The manufacturer no longer makes this part, and there's no substitute part
Lower half diagram
Part #20864
Replaced by #11X16MA
Lower half diagram
Part #133X3
Replaced by #90594MA
Upper half diagram
Part #26X186
The manufacturer no longer makes this part, and there's no substitute part
Upper half diagram
Part #26X216
Replaced by #26X216MA