Small Engines (Lawn Mowers, etc.): Self Propelled problem, briggs stratton, hp engine

Question
The self propelled is not working on our lawn mower, everything else works just fine.  The model is:
Yardman/Briggs & Stratton lawn mower
6.75 HP engine, 190CC
Model # 12A-449C755
         1619281
Thank you for your time

Answer
 Hello Terry:

 Is the Belt Broken? Go to this Addy http://www.buymtdonline.com/webapp/wcs/stores/servlet/BuyMTDOnline/index.jsp and Click Launch Illustrated Search Engine. Select the OEM(Yard-Man) and Enter the Model Numbers 12A-449C755 and Click Go. Then Double Click on the Model in the Search Window. Then Select the General Assembly. This will Open a New Window to View a Breakdown/IPL of the Mower. Hope this Helps. I am here if you Require more Assistance. Let me know what Happens, Please. Thanks.

 Good Luck

 Respectfully

 John