Small Engines (Lawn Mowers, etc.): I CANT START MY TORO LAWN..., toro lawn mower, heli coil

Question
I CAN'T START MY TORO LAWN MOWER AND THE SPARK PLUG WONT TIGHTEN.... IS THIS MY PROBLEM?

Answer
STEPHEN, DID YOU STRIP THE THREADS OUT???  ARE THE THREADS
ON THE PLUG STRIPPED???  BUT YES I THINK THIS COULD BE THR PROBLEM.  YOU MAY END UP TAKING THIS ONE TO THE SHOP AND
HAVE THEM INSTALL A "HELI-COIL" IN THE SPARK PLUG HOLE.

GOOD LUCK,
GEORGE