Part #STD533107
The manufacturer no longer makes this part, and there's no substitute part
Part #20613
Replaced by #420613MA
Mower housing diagram
Part #166X4
Replaced by #166X4MA
Lower half diagram
Part #10851Z
Replaced by #10851ZMA
Lower half diagram
Part #24994E
Replaced by #407928MA
Lower half diagram
Part #24533Z
Replaced by #91925MA
Lower half diagram
Part #37X51
Replaced by #37X51MA
Part #26X214
Replaced by #26X214MA
Lower half diagram
Part #55000
Replaced by #794299
Lower half diagram
Part #55028
Replaced by #55028MA