I have a 4 year old 20 hp, 46" cut mower that always starts good the first time each day and will run good for 10-15 minutes then suddenly stops. After that I must wait 15+ minutes and then it will only run for 4-7 minutes. I have done all the simple things such as remove gas tank, new gas, filters, spark plug without any solution. What should I try next, I'm 70 miles away from any dealer.
Thanks CL

Hi,
How about a stopped up gas cap.
Peace,
Clarke