Hi all. My lawn mower dies after 20-30 sec. of oper. I changed the spark plug. took off the carb. Didnt really do that great of a job with the gasket material reinstalling though. Anyway. I got the spring and bars back on the choke, and throttle.. all looks well but when I use it over med thick grass or after a 20 30 sec. running time, it dies and will not start until it has cooled off... Then starts right up like new again... What is going on with this thing. It is only 3 years old.. I do leave it outside over winter.. I changed gas and carb cleaned the carb.. What else can I do with it other than make a good boat anchor.. [email protected] Thanks for any input..