I need a manual for murray lawn tractor model 40508x92

Hi,
Well, with the model I can tell you your parts breakdown is here:
Murray lt Parts Diagram Index for 40508X92A
For an HTML version, and:
http://www.oscar-wilson.com/manuals/.../40508X92E.PDF
For a pdf version.
Owners manuals can be difficult to find back beyond the most recent decade.
Peace,
Clarke

Thanks, this was helpful!

-- Joe