Manual for the engine - no problem ;-
http://www.briggsandstratton.com/pdf/owners_manual/100/272308-Domestic.pdf
The manual for the mower (such as it is) is a different matter. A 'want it now' post on ebay might turn one up. It will only tell you how to assemble the grassbox and handles anyway.
phil_saunders@bigfoot.com
Phil Saunders, March 2009