Part #STD533107
The manufacturer no longer makes this part, and there's no substitute part
Part #20613
Replaced by #420613MA
Part #STD541431
The manufacturer no longer makes this part, and there's no substitute part
Lower half diagram
Part #133X3
Replaced by #90594MA
Lower half diagram
Part #10851Z
Replaced by #10851ZMA
Mower housing diagram
Part #20551
Replaced by #492574MA
Top half diagram
Part #26X215
Replaced by #26X235MA
Mower housing diagram
Part #28X23
Replaced by #703948
Lower half diagram
Part #20715
Replaced by #37X51MA
#NI
All parts diagram
Part #32618
Replaced by #32618MA