I just bought a brand new Husqvarna YTH2348 from Lowes. It has a 23 hp Briggs and Stratton Intek V-Twin engine and cuts a 48" strip. When I use it to mow, after about 45 minutes of use, the tractor stalls. Then I can't start it up until 10+ minutes later. There is still gas in the tank when this occurs, so I don't know what the problem is. What could be the problem and how should I fix it? Thanks in advance.