Small Engines (Lawn Mowers, etc.): trying to start my MTD, mtd yard machine, mtd yard machine mower

Question
I have a MTD yard machine mower 6HP, its about 12 years old, its been running fine this summer until now. I got a new spark plug, checked the carb gasket and the air filter is fine, but i cant get it started.      thx martin

Answer
Hi Martin,

You will need to determine if the problem is a lack of spark or a lack of fuel flow.  Right after it quits, remove the spark plug, reconnect the wire and lay it against the engine head.  Pull the engine over and watch for spark at the plug's electrode.

If good, then try to start it while squirting fuel or starting fluid into the carb intake.  If it starts and you can keep it running by adding fuel, then the carb most likely has dirt, debris or gummed fuel inside.
You will need to remove the carb, disassemble it, clean all the small internal openings and blow it out with compressed air.   Probe each and every hole with a small wire.   A carb rebuild kit wouldn't hurt either.  

Let me know how you make out.
Michael