Small Engines (Lawn Mowers, etc.): Murray, briggs and stratton, google

Question
I have Question. I have Murray 40" 12Hp .  It Stator run -ok. but not Turn Off-- By Start Switch.??

Answer
It is either a bad key switch or the ground wire that goes the engine shut-off terminal has come off.  Look at this picute:

http://www.google.com/search?hl=en&q=briggs+and+stratton+kill+terminal&bav=on.2,

Eric