Have an Ariens 42 inch 21 HP lawn tractor.Mowed lawn for 20 to 25 minutes shut it off and tried starting it 5 minutes later.Didn't even get a click when I tried to restart it.Checked the fuse, seat switch and the battery all checked out ok.The tractor is 10 months old and this is the first issue I had with it.Also air filter and gas filter all both clean. Any suggestions ?