Small Engines (Lawn Mowers, etc.): lawn mower repair, poulan weedeater, briggs stratton

Question
I have a Poulan Weedeater Quattro 4hp mulching lawn mower (22")/ - Briggs & Stratton Model 10A902/Type 2264EI/code 99061754. Recently redid the pull start, worked on first pull - mowed lawn. A week later, it will not start. Will not fire. Replaced spark plug, same lack of start. Do I need to clean or rebuild the carb? Can you direct me to a parts source? Thank you.

Answer
Is the plug firing?  This will be the first thing to establish.  Let me know if it is or isn't.  You can go to our website in my profile for parts and diagrams.  If you can't reply back through here you can also contact us through that site.  Thanks, PK.