I've got a craftsman 5000 mower with a kohler engine. Started fine and cut the grass a couple of times this spring. Started it up yesterday and drove it about 10 feet and then it died. Engine will turn over but not start. I replaced fuel filter, spark plugs and took off carb. and cleaned it out. Engine still turns over but will not run, although it does run a few seconds when I spray ether in carb. Any help much appreciated. Thanks