2011 60" with FX730 has been giving me fits. Used it about 5 hours, then one morning when I started it, raw gas was blowing out of the exhaust....about a coffee cup full. Checked vents, etc. After researching online, I found out there was a recall on the tank vents. Contacted Hustler, found out my serial number had not been complied with. Brought back to dealer and had it done. All is well until 2 days ago. Tried to start, but front cylinder loaded with fuel. Pulled plugs, cleared and dried cylinders, checked oil. Started right up and ran fine. Next day, exhaust full of fuel again. Going back to dealer, but not confident they are capable of doing anything more than I could do myself. Still under warranty. Suggestions ?