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 #10851Z
Replaced by #10851ZMA
Top half diagram
Part #20103
Replaced by #817000616
Mower housing diagram
Part #166X4
Replaced by #166X4MA
Lower half diagram
Part #55000
Replaced by #794299
Mower housing diagram
Part #2X39
Replaced by #2X39MA
Lower half diagram
Part #24994E
Replaced by #407928MA
Top half diagram
Part #STD551025
Replaced by #STD551025