Can anyone help with a model # and parts manual for this machine? I've checked the Exmark website, but their serial #'s don't go back as far as this one does (SR# 50462). Does it even have a sub-name? (Viking, Metro, etc.) I believe this is an early 1990 there abouts. I know I can look up the parts here: http://cgcequip.arinet.com/scripts/...lang=EN&loginid=CG999990&loginpwd=2006CGC1030 I just need a model # Thank you.