My 15 year old Honda 2113 has been stalling, and sometimes when it dies, it has to cool before it will restart. Runs well most of the time, always had regular oil changes and never wintered over with ethanol in it. Today it died and I don't think I had any spark. Could not see well in the sun, regardless. When it cooled I had spark and it started and ran normally. I really don't think it is the carb. I will replace the 2 year old spark plug, but I wonder if the ignition coil could be intermittently bad. Anybody got any experience? First time I've had problems with this mower, other than battery replacement and belt changes.