Small Engines (Lawn Mowers, etc.): scag moder cutting out, lawnmower shop, twin cylinder

Question
I have a walk behind scag mower that keeps cutting out on me.  Yesterday it cut out in about 2 minutes of using it.  In the past weeks it took at least 10 minutes to cut out.  It seems the cooler it is the more time it takes to cut out.  Yesterday was quite hot and muggy, probably in the 90's.

Answer
how is your oil level and check your air cleaner to make sure it is clean and check the plug if I remember wright this is a twin cylinder and the other thing it could be is the coil runs good when the engine is cold not so good when hot you could get that tested at a lawnmower shop cheap if you would like to so try them simple things and let me know how you make out