OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Trimmers and Brushcutters McCulloch Trimmers & Brushcutters McCulloch Pro Mac I Problem

I have a Pro mac I Super Gas String Trimmer that I am having trouble with at the moment. It starts and runs no problem cold, but after running awhile, if it is stopped for any reason it will not start again until it has cooled right down. I have changed the air filter and spark plug, with no affect. Any ideas?